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        /*!
			 * Vue.js v2.6.14
			 * (c) 2014-2021 Evan You
			 * Released under the MIT License.
			 */
        (function(global, factory) {
            typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() : typeof define ===
            'function' && define.amd ? define(factory) : (global = global || self, global.Vue = factory());
        }(this, function() {
            'use strict';
            /*  */
            var emptyObject = Object.freeze({});
            // These helpers produce better VM code in JS engines due to their
            // explicitness and function inlining.
            function isUndef(v) {
                return v === undefined || v === null
            }

            function isDef(v) {
                return v !== undefined && v !== null
            }

            function isTrue(v) {
                return v === true
            }

            function isFalse(v) {
                return v === false
            }
            /**
             * Check if value is primitive.
             */
            function isPrimitive(value) {
                return (typeof value === 'string' || typeof value === 'number' ||
                    // $flow-disable-line
                    typeof value === 'symbol' || typeof value === 'boolean')
            }
            /**
             * Quick object check - this is primarily used to tell
             * Objects from primitive values when we know the value
             * is a JSON-compliant type.
             */
            function isObject(obj) {
                return obj !== null && typeof obj === 'object'
            }
            /**
             * Get the raw type string of a value, e.g., [object Object].
             */
            var _toString = Object.prototype.toString;

            function toRawType(value) {
                return _toString.call(value).slice(8, -1)
            }
            /**
             * Strict object type check. Only returns true
             * for plain JavaScript objects.
             */
            function isPlainObject(obj) {
                return _toString.call(obj) === '[object Object]'
            }

            function isRegExp(v) {
                return _toString.call(v) === '[object RegExp]'
            }
            /**
             * Check if val is a valid array index.
             */
            function isValidArrayIndex(val) {
                var n = parseFloat(String(val));
                return n >= 0 && Math.floor(n) === n && isFinite(val)
            }

            function isPromise(val) {
                return (isDef(val) && typeof val.then === 'function' && typeof val.catch === 'function')
            }
            /**
             * Convert a value to a string that is actually rendered.
             */
            function toString(val) {
                return val == null ? '' : Array.isArray(val) || (isPlainObject(val) && val.toString === _toString) ?
                    JSON.stringify(val, null, 2) : String(val)
            }
            /**
             * Convert an input value to a number for persistence.
             * If the conversion fails, return original string.
             */
            function toNumber(val) {
                var n = parseFloat(val);
                return isNaN(n) ? val : n
            }
            /**
             * Make a map and return a function for checking if a key
             * is in that map.
             */
            function makeMap(str, expectsLowerCase) {
                var map = Object.create(null);
                var list = str.split(',');
                for (var i = 0; i < list.length; i++) {
                    map[list[i]] = true;
                }
                return expectsLowerCase ? function(val) {
                    return map[val.toLowerCase()];
                } : function(val) {
                    return map[val];
                }
            }
            /**
             * Check if a tag is a built-in tag.
             */
            var isBuiltInTag = makeMap('slot,component', true);
            /**
             * Check if an attribute is a reserved attribute.
             */
            var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
            /**
             * Remove an item from an array.
             */
            function remove(arr, item) {
                if (arr.length) {
                    var index = arr.indexOf(item);
                    if (index > -1) {
                        return arr.splice(index, 1)
                    }
                }
            }
            /**
             * Check whether an object has the property.
             */
            var hasOwnProperty = Object.prototype.hasOwnProperty;

            function hasOwn(obj, key) {
                return hasOwnProperty.call(obj, key)
            }
            /**
             * Create a cached version of a pure function.
             */
            function cached(fn) {
                var cache = Object.create(null);
                return (function cachedFn(str) {
                    var hit = cache[str];
                    return hit || (cache[str] = fn(str))
                })
            }
            /**
             * Camelize a hyphen-delimited string.
             */
            var camelizeRE = /-(\w)/g;
            var camelize = cached(function(str) {
                return str.replace(camelizeRE, function(_, c) {
                    return c ? c.toUpperCase() : '';
                })
            });
            /**
             * Capitalize a string.
             */
            var capitalize = cached(function(str) {
                return str.charAt(0).toUpperCase() + str.slice(1)
            });
            /**
             * Hyphenate a camelCase string.
             */
            var hyphenateRE = /\B([A-Z])/g;
            var hyphenate = cached(function(str) {
                return str.replace(hyphenateRE, '-$1').toLowerCase()
            });
            /**
             * Simple bind polyfill for environments that do not support it,
             * e.g., PhantomJS 1.x. Technically, we don't need this anymore
             * since native bind is now performant enough in most browsers.
             * But removing it would mean breaking code that was able to run in
             * PhantomJS 1.x, so this must be kept for backward compatibility.
             */
            /* istanbul ignore next */
            function polyfillBind(fn, ctx) {
                function boundFn(a) {
                    var l = arguments.length;
                    return l ? l > 1 ? fn.apply(ctx, arguments) : fn.call(ctx, a) : fn.call(ctx)
                }
                boundFn._length = fn.length;
                return boundFn
            }

            function nativeBind(fn, ctx) {
                return fn.bind(ctx)
            }
            var bind = Function.prototype.bind ? nativeBind : polyfillBind;
            /**
             * Convert an Array-like object to a real Array.
             */
            function toArray(list, start) {
                start = start || 0;
                var i = list.length - start;
                var ret = new Array(i);
                while (i--) {
                    ret[i] = list[i + start];
                }
                return ret
            }
            /**
             * Mix properties into target object.
             */
            function extend(to, _from) {
                for (var key in _from) {
                    to[key] = _from[key];
                }
                return to
            }
            /**
             * Merge an Array of Objects into a single Object.
             */
            function toObject(arr) {
                var res = {};
                for (var i = 0; i < arr.length; i++) {
                    if (arr[i]) {
                        extend(res, arr[i]);
                    }
                }
                return res
            }
            /* eslint-disable no-unused-vars */
            /**
             * Perform no operation.
             * Stubbing args to make Flow happy without leaving useless transpiled code
             * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
             */
            function noop(a, b, c) {}
            /**
             * Always return false.
             */
            var no = function(a, b, c) {
                return false;
            };
            /* eslint-enable no-unused-vars */
            /**
             * Return the same value.
             */
            var identity = function(_) {
                return _;
            };
            /**
             * Generate a string containing static keys from compiler modules.
             */
            function genStaticKeys(modules) {
                return modules.reduce(function(keys, m) {
                    return keys.concat(m.staticKeys || [])
                }, []).join(',')
            }
            /**
             * Check if two values are loosely equal - that is,
             * if they are plain objects, do they have the same shape?
             */
            function looseEqual(a, b) {
                if (a === b) {
                    return true
                }
                var isObjectA = isObject(a);
                var isObjectB = isObject(b);
                if (isObjectA && isObjectB) {
                    try {
                        var isArrayA = Array.isArray(a);
                        var isArrayB = Array.isArray(b);
                        if (isArrayA && isArrayB) {
                            return a.length === b.length && a.every(function(e, i) {
                                return looseEqual(e, b[i])
                            })
                        } else if (a instanceof Date && b instanceof Date) {
                            return a.getTime() === b.getTime()
                        } else if (!isArrayA && !isArrayB) {
                            var keysA = Object.keys(a);
                            var keysB = Object.keys(b);
                            return keysA.length === keysB.length && keysA.every(function(key) {
                                return looseEqual(a[key], b[key])
                            })
                        } else {
                            /* istanbul ignore next */
                            return false
                        }
                    } catch (e) {
                        /* istanbul ignore next */
                        return false
                    }
                } else if (!isObjectA && !isObjectB) {
                    return String(a) === String(b)
                } else {
                    return false
                }
            }
            /**
             * Return the first index at which a loosely equal value can be
             * found in the array (if value is a plain object, the array must
             * contain an object of the same shape), or -1 if it is not present.
             */
            function looseIndexOf(arr, val) {
                for (var i = 0; i < arr.length; i++) {
                    if (looseEqual(arr[i], val)) {
                        return i
                    }
                }
                return -1
            }
            /**
             * Ensure a function is called only once.
             */
            function once(fn) {
                var called = false;
                return function() {
                    if (!called) {
                        called = true;
                        fn.apply(this, arguments);
                    }
                }
            }
            var SSR_ATTR = 'data-server-rendered';
            var ASSET_TYPES = ['component', 'directive', 'filter'];
            var LIFECYCLE_HOOKS = ['beforeCreate', 'created', 'beforeMount', 'mounted', 'beforeUpdate', 'updated',
                'beforeDestroy', 'destroyed', 'activated', 'deactivated', 'errorCaptured', 'serverPrefetch'
            ];
            /*  */
            var config = ({
                /**
                 * Option merge strategies (used in core/util/options)
                 */
                // $flow-disable-line
                optionMergeStrategies: Object.create(null),
                /**
                 * Whether to suppress warnings.
                 */
                silent: false,
                /**
                 * Show production mode tip message on boot?
                 */
                productionTip: "development" !== 'production',
                /**
                 * Whether to enable devtools
                 */
                devtools: "development" !== 'production',
                /**
                 * Whether to record perf
                 */
                performance: false,
                /**
                 * Error handler for watcher errors
                 */
                errorHandler: null,
                /**
                 * Warn handler for watcher warns
                 */
                warnHandler: null,
                /**
                 * Ignore certain custom elements
                 */
                ignoredElements: [],
                /**
                 * Custom user key aliases for v-on
                 */
                // $flow-disable-line
                keyCodes: Object.create(null),
                /**
                 * Check if a tag is reserved so that it cannot be registered as a
                 * component. This is platform-dependent and may be overwritten.
                 */
                isReservedTag: no,
                /**
                 * Check if an attribute is reserved so that it cannot be used as a component
                 * prop. This is platform-dependent and may be overwritten.
                 */
                isReservedAttr: no,
                /**
                 * Check if a tag is an unknown element.
                 * Platform-dependent.
                 */
                isUnknownElement: no,
                /**
                 * Get the namespace of an element
                 */
                getTagNamespace: noop,
                /**
                 * Parse the real tag name for the specific platform.
                 */
                parsePlatformTagName: identity,
                /**
                 * Check if an attribute must be bound using property, e.g. value
                 * Platform-dependent.
                 */
                mustUseProp: no,
                /**
                 * Perform updates asynchronously. Intended to be used by Vue Test Utils
                 * This will significantly reduce performance if set to false.
                 */
                async: true,
                /**
                 * Exposed for legacy reasons
                 */
                _lifecycleHooks: LIFECYCLE_HOOKS
            });
            /*  */
            /**
             * unicode letters used for parsing html tags, component names and property paths.
             * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
             * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
             */
            var unicodeRegExp =
                /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
            /**
             * Check if a string starts with $ or _
             */
            function isReserved(str) {
                var c = (str + '').charCodeAt(0);
                return c === 0x24 || c === 0x5F
            }
            /**
             * Define a property.
             */
            function def(obj, key, val, enumerable) {
                Object.defineProperty(obj, key, {
                    value: val,
                    enumerable: !!enumerable,
                    writable: true,
                    configurable: true
                });
            }
            /**
             * Parse simple path.
             */
            var bailRE = new RegExp(("[^" + (unicodeRegExp.source) + ".$_\\d]"));

            function parsePath(path) {
                if (bailRE.test(path)) {
                    return
                }
                var segments = path.split('.');
                return function(obj) {
                    for (var i = 0; i < segments.length; i++) {
                        if (!obj) {
                            return
                        }
                        obj = obj[segments[i]];
                    }
                    return obj
                }
            }
            /*  */
            // can we use __proto__?
            var hasProto = '__proto__' in {};
            // Browser environment sniffing
            var inBrowser = typeof window !== 'undefined';
            var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
            var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
            var UA = inBrowser && window.navigator.userAgent.toLowerCase();
            var isIE = UA && /msie|trident/.test(UA);
            var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
            var isEdge = UA && UA.indexOf('edge/') > 0;
            var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
            var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
            var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
            var isPhantomJS = UA && /phantomjs/.test(UA);
            var isFF = UA && UA.match(/firefox\/(\d+)/);
            // Firefox has a "watch" function on Object.prototype...
            var nativeWatch = ({}).watch;
            var supportsPassive = false;
            if (inBrowser) {
                try {
                    var opts = {};
                    Object.defineProperty(opts, 'passive', ({
                        get: function get() {
                            /* istanbul ignore next */
                            supportsPassive = true;
                        }
                    })); // https://github.com/facebook/flow/issues/285
                    window.addEventListener('test-passive', null, opts);
                } catch (e) {}
            }
            // this needs to be lazy-evaled because vue may be required before
            // vue-server-renderer can set VUE_ENV
            var _isServer;
            var isServerRendering = function() {
                if (_isServer === undefined) {
                    /* istanbul ignore if */
                    if (!inBrowser && !inWeex && typeof global !== 'undefined') {
                        // detect presence of vue-server-renderer and avoid
                        // Webpack shimming the process
                        _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
                    } else {
                        _isServer = false;
                    }
                }
                return _isServer
            };
            // detect devtools
            var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
            /* istanbul ignore next */
            function isNative(Ctor) {
                return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
            }
            var hasSymbol = typeof Symbol !== 'undefined' && isNative(Symbol) && typeof Reflect !== 'undefined' &&
                isNative(Reflect.ownKeys);
            var _Set;
            /* istanbul ignore if */ // $flow-disable-line
            if (typeof Set !== 'undefined' && isNative(Set)) {
                // use native Set when available.
                _Set = Set;
            } else {
                // a non-standard Set polyfill that only works with primitive keys.
                _Set = /*@__PURE__*/ (function() {
                    function Set() {
                        this.set = Object.create(null);
                    }
                    Set.prototype.has = function has(key) {
                        return this.set[key] === true
                    };
                    Set.prototype.add = function add(key) {
                        this.set[key] = true;
                    };
                    Set.prototype.clear = function clear() {
                        this.set = Object.create(null);
                    };
                    return Set;
                }());
            }
            /*  */
            var warn = noop;
            var tip = noop;
            var generateComponentTrace = (noop); // work around flow check
            var formatComponentName = (noop); {
                var hasConsole = typeof console !== 'undefined';
                var classifyRE = /(?:^|[-_])(\w)/g;
                var classify = function(str) {
                    return str.replace(classifyRE, function(c) {
                        return c.toUpperCase();
                    }).replace(/[-_]/g, '');
                };
                warn = function(msg, vm) {
                    var trace = vm ? generateComponentTrace(vm) : '';
                    if (config.warnHandler) {
                        config.warnHandler.call(null, msg, vm, trace);
                    } else if (hasConsole && (!config.silent)) {
                        console.error(("[Vue warn]: " + msg + trace));
                    }
                };
                tip = function(msg, vm) {
                    if (hasConsole && (!config.silent)) {
                        console.warn("[Vue tip]: " + msg + (vm ? generateComponentTrace(vm) : ''));
                    }
                };
                formatComponentName = function(vm, includeFile) {
                    if (vm.$root === vm) {
                        return '<Root>'
                    }
                    var options = typeof vm === 'function' && vm.cid != null ? vm.options : vm._isVue ? vm
                        .$options || vm.constructor.options : vm;
                    var name = options.name || options._componentTag;
                    var file = options.__file;
                    if (!name && file) {
                        var match = file.match(/([^/\\]+)\.vue$/);
                        name = match && match[1];
                    }
                    return (
                        (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") + (file && includeFile !==
                        false ? (" at " + file) : ''))
                };
                var repeat = function(str, n) {
                    var res = '';
                    while (n) {
                        if (n % 2 === 1) {
                            res += str;
                        }
                        if (n > 1) {
                            str += str;
                        }
                        n >>= 1;
                    }
                    return res
                };
                generateComponentTrace = function(vm) {
                    if (vm._isVue && vm.$parent) {
                        var tree = [];
                        var currentRecursiveSequence = 0;
                        while (vm) {
                            if (tree.length > 0) {
                                var last = tree[tree.length - 1];
                                if (last.constructor === vm.constructor) {
                                    currentRecursiveSequence++;
                                    vm = vm.$parent;
                                    continue
                                } else if (currentRecursiveSequence > 0) {
                                    tree[tree.length - 1] = [last, currentRecursiveSequence];
                                    currentRecursiveSequence = 0;
                                }
                            }
                            tree.push(vm);
                            vm = vm.$parent;
                        }
                        return '\n\nfound in\n\n' + tree.map(function(vm, i) {
                            return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(
                                vm) ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) +
                                " recursive calls)") : formatComponentName(vm)));
                        }).join('\n')
                    } else {
                        return ("\n\n(found in " + (formatComponentName(vm)) + ")")
                    }
                };
            }
            /*  */
            var uid = 0;
            /**
             * A dep is an observable that can have multiple
             * directives subscribing to it.
             */
            var Dep = function Dep() {
                this.id = uid++;
                this.subs = [];
            };
            Dep.prototype.addSub = function addSub(sub) {
                this.subs.push(sub);
            };
            Dep.prototype.removeSub = function removeSub(sub) {
                remove(this.subs, sub);
            };
            Dep.prototype.depend = function depend() {
                if (Dep.target) {
                    Dep.target.addDep(this);
                }
            };
            Dep.prototype.notify = function notify() {
                // stabilize the subscriber list first
                var subs = this.subs.slice();
                if (!config.async) {
                    // subs aren't sorted in scheduler if not running async
                    // we need to sort them now to make sure they fire in correct
                    // order
                    subs.sort(function(a, b) {
                        return a.id - b.id;
                    });
                }
                for (var i = 0, l = subs.length; i < l; i++) {
                    subs[i].update();
                }
            };
            // The current target watcher being evaluated.
            // This is globally unique because only one watcher
            // can be evaluated at a time.
            Dep.target = null;
            var targetStack = [];

            function pushTarget(target) {
                targetStack.push(target);
                Dep.target = target;
            }

            function popTarget() {
                targetStack.pop();
                Dep.target = targetStack[targetStack.length - 1];
            }
            /*  */
            var VNode = function VNode(tag, data, children, text, elm, context, componentOptions, asyncFactory) {
                this.tag = tag;
                this.data = data;
                this.children = children;
                this.text = text;
                this.elm = elm;
                this.ns = undefined;
                this.context = context;
                this.fnContext = undefined;
                this.fnOptions = undefined;
                this.fnScopeId = undefined;
                this.key = data && data.key;
                this.componentOptions = componentOptions;
                this.componentInstance = undefined;
                this.parent = undefined;
                this.raw = false;
                this.isStatic = false;
                this.isRootInsert = true;
                this.isComment = false;
                this.isCloned = false;
                this.isOnce = false;
                this.asyncFactory = asyncFactory;
                this.asyncMeta = undefined;
                this.isAsyncPlaceholder = false;
            };
            var prototypeAccessors = {
                child: {
                    configurable: true
                }
            };
            // DEPRECATED: alias for componentInstance for backwards compat.
            /* istanbul ignore next */
            prototypeAccessors.child.get = function() {
                return this.componentInstance
            };
            Object.defineProperties(VNode.prototype, prototypeAccessors);
            var createEmptyVNode = function(text) {
                if (text === void 0) text = '';
                var node = new VNode();
                node.text = text;
                node.isComment = true;
                return node
            };

            function createTextVNode(val) {
                return new VNode(undefined, undefined, undefined, String(val))
            }
            // optimized shallow clone
            // used for static nodes and slot nodes because they may be reused across
            // multiple renders, cloning them avoids errors when DOM manipulations rely
            // on their elm reference.
            function cloneVNode(vnode) {
                var cloned = new VNode(vnode.tag, vnode.data,
                    // #7975
                    // clone children array to avoid mutating original in case of cloning
                    // a child.
                    vnode.children && vnode.children.slice(), vnode.text, vnode.elm, vnode.context, vnode
                        .componentOptions, vnode.asyncFactory);
                cloned.ns = vnode.ns;
                cloned.isStatic = vnode.isStatic;
                cloned.key = vnode.key;
                cloned.isComment = vnode.isComment;
                cloned.fnContext = vnode.fnContext;
                cloned.fnOptions = vnode.fnOptions;
                cloned.fnScopeId = vnode.fnScopeId;
                cloned.asyncMeta = vnode.asyncMeta;
                cloned.isCloned = true;
                return cloned
            }
            /*
				 * not type checking this file because flow doesn't play well with
				 * dynamically accessing methods on Array prototype
				 */
            var arrayProto = Array.prototype;
            var arrayMethods = Object.create(arrayProto);
            var methodsToPatch = ['push', 'pop', 'shift', 'unshift', 'splice', 'sort', 'reverse'];
            /**
             * Intercept mutating methods and emit events
             */
            methodsToPatch.forEach(function(method) {
                // cache original method
                var original = arrayProto[method];
                def(arrayMethods, method, function mutator() {
                    var args = [],
                        len = arguments.length;
                    while (len--) args[len] = arguments[len];
                    var result = original.apply(this, args);
                    var ob = this.__ob__;
                    var inserted;
                    switch (method) {
                        case 'push':
                        case 'unshift':
                            inserted = args;
                            break
                        case 'splice':
                            inserted = args.slice(2);
                            break
                    }
                    if (inserted) {
                        ob.observeArray(inserted);
                    }
                    // notify change
                    ob.dep.notify();
                    return result
                });
            });
            /*  */
            var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
            /**
             * In some cases we may want to disable observation inside a component's
             * update computation.
             */
            var shouldObserve = true;

            function toggleObserving(value) {
                shouldObserve = value;
            }
            /**
             * Observer class that is attached to each observed
             * object. Once attached, the observer converts the target
             * object's property keys into getter/setters that
             * collect dependencies and dispatch updates.
             */
            var Observer = function Observer(value) {
                this.value = value;
                this.dep = new Dep();
                this.vmCount = 0;
                def(value, '__ob__', this);
                if (Array.isArray(value)) {
                    if (hasProto) {
                        protoAugment(value, arrayMethods);
                    } else {
                        copyAugment(value, arrayMethods, arrayKeys);
                    }
                    this.observeArray(value);
                } else {
                    this.walk(value);
                }
            };
            /**
             * Walk through all properties and convert them into
             * getter/setters. This method should only be called when
             * value type is Object.
             */
            Observer.prototype.walk = function walk(obj) {
                var keys = Object.keys(obj);
                for (var i = 0; i < keys.length; i++) {
                    defineReactive$$1(obj, keys[i]);
                }
            };
            /**
             * Observe a list of Array items.
             */
            Observer.prototype.observeArray = function observeArray(items) {
                for (var i = 0, l = items.length; i < l; i++) {
                    observe(items[i]);
                }
            };
            // helpers
            /**
             * Augment a target Object or Array by intercepting
             * the prototype chain using __proto__
             */
            function protoAugment(target, src) {
                /* eslint-disable no-proto */
                target.__proto__ = src;
                /* eslint-enable no-proto */
            }
            /**
             * Augment a target Object or Array by defining
             * hidden properties.
             */
            /* istanbul ignore next */
            function copyAugment(target, src, keys) {
                for (var i = 0, l = keys.length; i < l; i++) {
                    var key = keys[i];
                    def(target, key, src[key]);
                }
            }
            /**
             * Attempt to create an observer instance for a value,
             * returns the new observer if successfully observed,
             * or the existing observer if the value already has one.
             */
            function observe(value, asRootData) {
                if (!isObject(value) || value instanceof VNode) {
                    return
                }
                var ob;
                if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
                    ob = value.__ob__;
                } else if (shouldObserve && !isServerRendering() && (Array.isArray(value) || isPlainObject(value)) &&
                    Object.isExtensible(value) && !value._isVue) {
                    ob = new Observer(value);
                }
                if (asRootData && ob) {
                    ob.vmCount++;
                }
                return ob
            }
            /**
             * Define a reactive property on an Object.
             */
            function defineReactive$$1(obj, key, val, customSetter, shallow) {
                var dep = new Dep();
                var property = Object.getOwnPropertyDescriptor(obj, key);
                if (property && property.configurable === false) {
                    return
                }
                // cater for pre-defined getter/setters
                var getter = property && property.get;
                var setter = property && property.set;
                if ((!getter || setter) && arguments.length === 2) {
                    val = obj[key];
                }
                var childOb = !shallow && observe(val);
                Object.defineProperty(obj, key, {
                    enumerable: true,
                    configurable: true,
                    get: function reactiveGetter() {
                        var value = getter ? getter.call(obj) : val;
                        if (Dep.target) {
                            dep.depend();
                            if (childOb) {
                                childOb.dep.depend();
                                if (Array.isArray(value)) {
                                    dependArray(value);
                                }
                            }
                        }
                        return value
                    },
                    set: function reactiveSetter(newVal) {
                        var value = getter ? getter.call(obj) : val;
                        /* eslint-disable no-self-compare */
                        if (newVal === value || (newVal !== newVal && value !== value)) {
                            return
                        }
                        /* eslint-enable no-self-compare */
                        if (customSetter) {
                            customSetter();
                        }
                        // #7981: for accessor properties without setter
                        if (getter && !setter) {
                            return
                        }
                        if (setter) {
                            setter.call(obj, newVal);
                        } else {
                            val = newVal;
                        }
                        childOb = !shallow && observe(newVal);
                        dep.notify();
                    }
                });
            }
            /**
             * Set a property on an object. Adds the new property and
             * triggers change notification if the property doesn't
             * already exist.
             */
            function set(target, key, val) {
                if (isUndef(target) || isPrimitive(target)) {
                    warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
                }
                if (Array.isArray(target) && isValidArrayIndex(key)) {
                    target.length = Math.max(target.length, key);
                    target.splice(key, 1, val);
                    return val
                }
                if (key in target && !(key in Object.prototype)) {
                    target[key] = val;
                    return val
                }
                var ob = (target).__ob__;
                if (target._isVue || (ob && ob.vmCount)) {
                    warn('Avoid adding reactive properties to a Vue instance or its root $data ' +
                        'at runtime - declare it upfront in the data option.');
                    return val
                }
                if (!ob) {
                    target[key] = val;
                    return val
                }
                defineReactive$$1(ob.value, key, val);
                ob.dep.notify();
                return val
            }
            /**
             * Delete a property and trigger change if necessary.
             */
            function del(target, key) {
                if (isUndef(target) || isPrimitive(target)) {
                    warn(("Cannot delete reactive property on undefined, null, or primitive value: " + ((target))));
                }
                if (Array.isArray(target) && isValidArrayIndex(key)) {
                    target.splice(key, 1);
                    return
                }
                var ob = (target).__ob__;
                if (target._isVue || (ob && ob.vmCount)) {
                    warn('Avoid deleting properties on a Vue instance or its root $data ' +
                        '- just set it to null.');
                    return
                }
                if (!hasOwn(target, key)) {
                    return
                }
                delete target[key];
                if (!ob) {
                    return
                }
                ob.dep.notify();
            }
            /**
             * Collect dependencies on array elements when the array is touched, since
             * we cannot intercept array element access like property getters.
             */
            function dependArray(value) {
                for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
                    e = value[i];
                    e && e.__ob__ && e.__ob__.dep.depend();
                    if (Array.isArray(e)) {
                        dependArray(e);
                    }
                }
            }
            /*  */
            /**
             * Option overwriting strategies are functions that handle
             * how to merge a parent option value and a child option
             * value into the final value.
             */
            var strats = config.optionMergeStrategies;
            /**
             * Options with restrictions
             */
            {
                strats.el = strats.propsData = function(parent, child, vm, key) {
                    if (!vm) {
                        warn("option \"" + key + "\" can only be used during instance " +
                            'creation with the `new` keyword.');
                    }
                    return defaultStrat(parent, child)
                };
            }
            /**
             * Helper that recursively merges two data objects together.
             */
            function mergeData(to, from) {
                if (!from) {
                    return to
                }
                var key, toVal, fromVal;
                var keys = hasSymbol ? Reflect.ownKeys(from) : Object.keys(from);
                for (var i = 0; i < keys.length; i++) {
                    key = keys[i];
                    // in case the object is already observed...
                    if (key === '__ob__') {
                        continue
                    }
                    toVal = to[key];
                    fromVal = from[key];
                    if (!hasOwn(to, key)) {
                        set(to, key, fromVal);
                    } else if (toVal !== fromVal && isPlainObject(toVal) && isPlainObject(fromVal)) {
                        mergeData(toVal, fromVal);
                    }
                }
                return to
            }
            /**
             * Data
             */
            function mergeDataOrFn(parentVal, childVal, vm) {
                if (!vm) {
                    // in a Vue.extend merge, both should be functions
                    if (!childVal) {
                        return parentVal
                    }
                    if (!parentVal) {
                        return childVal
                    }
                    // when parentVal & childVal are both present,
                    // we need to return a function that returns the
                    // merged result of both functions... no need to
                    // check if parentVal is a function here because
                    // it has to be a function to pass previous merges.
                    return function mergedDataFn() {
                        return mergeData(typeof childVal === 'function' ? childVal.call(this, this) : childVal,
                            typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal)
                    }
                } else {
                    return function mergedInstanceDataFn() {
                        // instance merge
                        var instanceData = typeof childVal === 'function' ? childVal.call(vm, vm) : childVal;
                        var defaultData = typeof parentVal === 'function' ? parentVal.call(vm, vm) : parentVal;
                        if (instanceData) {
                            return mergeData(instanceData, defaultData)
                        } else {
                            return defaultData
                        }
                    }
                }
            }
            strats.data = function(parentVal, childVal, vm) {
                if (!vm) {
                    if (childVal && typeof childVal !== 'function') {
                        warn('The "data" option should be a function ' +
                            'that returns a per-instance value in component ' + 'definitions.', vm);
                        return parentVal
                    }
                    return mergeDataOrFn(parentVal, childVal)
                }
                return mergeDataOrFn(parentVal, childVal, vm)
            };
            /**
             * Hooks and props are merged as arrays.
             */
            function mergeHook(parentVal, childVal) {
                var res = childVal ? parentVal ? parentVal.concat(childVal) : Array.isArray(childVal) ? childVal : [
                    childVal
                ] : parentVal;
                return res ? dedupeHooks(res) : res
            }

            function dedupeHooks(hooks) {
                var res = [];
                for (var i = 0; i < hooks.length; i++) {
                    if (res.indexOf(hooks[i]) === -1) {
                        res.push(hooks[i]);
                    }
                }
                return res
            }
            LIFECYCLE_HOOKS.forEach(function(hook) {
                strats[hook] = mergeHook;
            });
            /**
             * Assets
             *
             * When a vm is present (instance creation), we need to do
             * a three-way merge between constructor options, instance
             * options and parent options.
             */
            function mergeAssets(parentVal, childVal, vm, key) {
                var res = Object.create(parentVal || null);
                if (childVal) {
                    assertObjectType(key, childVal, vm);
                    return extend(res, childVal)
                } else {
                    return res
                }
            }
            ASSET_TYPES.forEach(function(type) {
                strats[type + 's'] = mergeAssets;
            });
            /**
             * Watchers.
             *
             * Watchers hashes should not overwrite one
             * another, so we merge them as arrays.
             */
            strats.watch = function(parentVal, childVal, vm, key) {
                // work around Firefox's Object.prototype.watch...
                if (parentVal === nativeWatch) {
                    parentVal = undefined;
                }
                if (childVal === nativeWatch) {
                    childVal = undefined;
                }
                /* istanbul ignore if */
                if (!childVal) {
                    return Object.create(parentVal || null)
                } {
                    assertObjectType(key, childVal, vm);
                }
                if (!parentVal) {
                    return childVal
                }
                var ret = {};
                extend(ret, parentVal);
                for (var key$1 in childVal) {
                    var parent = ret[key$1];
                    var child = childVal[key$1];
                    if (parent && !Array.isArray(parent)) {
                        parent = [parent];
                    }
                    ret[key$1] = parent ? parent.concat(child) : Array.isArray(child) ? child : [child];
                }
                return ret
            };
            /**
             * Other object hashes.
             */
            strats.props = strats.methods = strats.inject = strats.computed = function(parentVal, childVal, vm,
                                                                                       key) {
                if (childVal && "development" !== 'production') {
                    assertObjectType(key, childVal, vm);
                }
                if (!parentVal) {
                    return childVal
                }
                var ret = Object.create(null);
                extend(ret, parentVal);
                if (childVal) {
                    extend(ret, childVal);
                }
                return ret
            };
            strats.provide = mergeDataOrFn;
            /**
             * Default strategy.
             */
            var defaultStrat = function(parentVal, childVal) {
                return childVal === undefined ? parentVal : childVal
            };
            /**
             * Validate component names
             */
            function checkComponents(options) {
                for (var key in options.components) {
                    validateComponentName(key);
                }
            }

            function validateComponentName(name) {
                if (!new RegExp(("^[a-zA-Z][\\-\\.0-9_" + (unicodeRegExp.source) + "]*$")).test(name)) {
                    warn('Invalid component name: "' + name + '". Component names ' +
                        'should conform to valid custom element name in html5 specification.');
                }
                if (isBuiltInTag(name) || config.isReservedTag(name)) {
                    warn('Do not use built-in or reserved HTML elements as component ' + 'id: ' + name);
                }
            }
            /**
             * Ensure all props option syntax are normalized into the
             * Object-based format.
             */
            function normalizeProps(options, vm) {
                var props = options.props;
                if (!props) {
                    return
                }
                var res = {};
                var i, val, name;
                if (Array.isArray(props)) {
                    i = props.length;
                    while (i--) {
                        val = props[i];
                        if (typeof val === 'string') {
                            name = camelize(val);
                            res[name] = {
                                type: null
                            };
                        } else {
                            warn('props must be strings when using array syntax.');
                        }
                    }
                } else if (isPlainObject(props)) {
                    for (var key in props) {
                        val = props[key];
                        name = camelize(key);
                        res[name] = isPlainObject(val) ? val : {
                            type: val
                        };
                    }
                } else {
                    warn("Invalid value for option \"props\": expected an Array or an Object, " + "but got " + (
                        toRawType(props)) + ".", vm);
                }
                options.props = res;
            }
            /**
             * Normalize all injections into Object-based format
             */
            function normalizeInject(options, vm) {
                var inject = options.inject;
                if (!inject) {
                    return
                }
                var normalized = options.inject = {};
                if (Array.isArray(inject)) {
                    for (var i = 0; i < inject.length; i++) {
                        normalized[inject[i]] = {
                            from: inject[i]
                        };
                    }
                } else if (isPlainObject(inject)) {
                    for (var key in inject) {
                        var val = inject[key];
                        normalized[key] = isPlainObject(val) ? extend({
                            from: key
                        }, val) : {
                            from: val
                        };
                    }
                } else {
                    warn("Invalid value for option \"inject\": expected an Array or an Object, " + "but got " + (
                        toRawType(inject)) + ".", vm);
                }
            }
            /**
             * Normalize raw function directives into object format.
             */
            function normalizeDirectives(options) {
                var dirs = options.directives;
                if (dirs) {
                    for (var key in dirs) {
                        var def$$1 = dirs[key];
                        if (typeof def$$1 === 'function') {
                            dirs[key] = {
                                bind: def$$1,
                                update: def$$1
                            };
                        }
                    }
                }
            }

            function assertObjectType(name, value, vm) {
                if (!isPlainObject(value)) {
                    warn("Invalid value for option \"" + name + "\": expected an Object, " + "but got " + (toRawType(
                        value)) + ".", vm);
                }
            }
            /**
             * Merge two option objects into a new one.
             * Core utility used in both instantiation and inheritance.
             */
            function mergeOptions(parent, child, vm) {
                {
                    checkComponents(child);
                }
                if (typeof child === 'function') {
                    child = child.options;
                }
                normalizeProps(child, vm);
                normalizeInject(child, vm);
                normalizeDirectives(child);
                // Apply extends and mixins on the child options,
                // but only if it is a raw options object that isn't
                // the result of another mergeOptions call.
                // Only merged options has the _base property.
                if (!child._base) {
                    if (child.extends) {
                        parent = mergeOptions(parent, child.extends, vm);
                    }
                    if (child.mixins) {
                        for (var i = 0, l = child.mixins.length; i < l; i++) {
                            parent = mergeOptions(parent, child.mixins[i], vm);
                        }
                    }
                }
                var options = {};
                var key;
                for (key in parent) {
                    mergeField(key);
                }
                for (key in child) {
                    if (!hasOwn(parent, key)) {
                        mergeField(key);
                    }
                }

                function mergeField(key) {
                    var strat = strats[key] || defaultStrat;
                    options[key] = strat(parent[key], child[key], vm, key);
                }
                return options
            }
            /**
             * Resolve an asset.
             * This function is used because child instances need access
             * to assets defined in its ancestor chain.
             */
            function resolveAsset(options, type, id, warnMissing) {
                /* istanbul ignore if */
                if (typeof id !== 'string') {
                    return
                }
                var assets = options[type];
                // check local registration variations first
                if (hasOwn(assets, id)) {
                    return assets[id]
                }
                var camelizedId = camelize(id);
                if (hasOwn(assets, camelizedId)) {
                    return assets[camelizedId]
                }
                var PascalCaseId = capitalize(camelizedId);
                if (hasOwn(assets, PascalCaseId)) {
                    return assets[PascalCaseId]
                }
                // fallback to prototype chain
                var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
                if (warnMissing && !res) {
                    warn('Failed to resolve ' + type.slice(0, -1) + ': ' + id, options);
                }
                return res
            }
            /*  */
            function validateProp(key, propOptions, propsData, vm) {
                var prop = propOptions[key];
                var absent = !hasOwn(propsData, key);
                var value = propsData[key];
                // boolean casting
                var booleanIndex = getTypeIndex(Boolean, prop.type);
                if (booleanIndex > -1) {
                    if (absent && !hasOwn(prop, 'default')) {
                        value = false;
                    } else if (value === '' || value === hyphenate(key)) {
                        // only cast empty string / same name to boolean if
                        // boolean has higher priority
                        var stringIndex = getTypeIndex(String, prop.type);
                        if (stringIndex < 0 || booleanIndex < stringIndex) {
                            value = true;
                        }
                    }
                }
                // check default value
                if (value === undefined) {
                    value = getPropDefaultValue(vm, prop, key);
                    // since the default value is a fresh copy,
                    // make sure to observe it.
                    var prevShouldObserve = shouldObserve;
                    toggleObserving(true);
                    observe(value);
                    toggleObserving(prevShouldObserve);
                } {
                    assertProp(prop, key, value, vm, absent);
                }
                return value
            }
            /**
             * Get the default value of a prop.
             */
            function getPropDefaultValue(vm, prop, key) {
                // no default, return undefined
                if (!hasOwn(prop, 'default')) {
                    return undefined
                }
                var def = prop.default;
                // warn against non-factory defaults for Object & Array
                if (isObject(def)) {
                    warn('Invalid default value for prop "' + key + '": ' +
                        'Props with type Object/Array must use a factory function ' +
                        'to return the default value.', vm);
                }
                // the raw prop value was also undefined from previous render,
                // return previous default value to avoid unnecessary watcher trigger
                if (vm && vm.$options.propsData && vm.$options.propsData[key] === undefined && vm._props[key] !==
                    undefined) {
                    return vm._props[key]
                }
                // call factory function for non-Function types
                // a value is Function if its prototype is function even across different execution context
                return typeof def === 'function' && getType(prop.type) !== 'Function' ? def.call(vm) : def
            }
            /**
             * Assert whether a prop is valid.
             */
            function assertProp(prop, name, value, vm, absent) {
                if (prop.required && absent) {
                    warn('Missing required prop: "' + name + '"', vm);
                    return
                }
                if (value == null && !prop.required) {
                    return
                }
                var type = prop.type;
                var valid = !type || type === true;
                var expectedTypes = [];
                if (type) {
                    if (!Array.isArray(type)) {
                        type = [type];
                    }
                    for (var i = 0; i < type.length && !valid; i++) {
                        var assertedType = assertType(value, type[i], vm);
                        expectedTypes.push(assertedType.expectedType || '');
                        valid = assertedType.valid;
                    }
                }
                var haveExpectedTypes = expectedTypes.some(function(t) {
                    return t;
                });
                if (!valid && haveExpectedTypes) {
                    warn(getInvalidTypeMessage(name, value, expectedTypes), vm);
                    return
                }
                var validator = prop.validator;
                if (validator) {
                    if (!validator(value)) {
                        warn('Invalid prop: custom validator check failed for prop "' + name + '".', vm);
                    }
                }
            }
            var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol|BigInt)$/;

            function assertType(value, type, vm) {
                var valid;
                var expectedType = getType(type);
                if (simpleCheckRE.test(expectedType)) {
                    var t = typeof value;
                    valid = t === expectedType.toLowerCase();
                    // for primitive wrapper objects
                    if (!valid && t === 'object') {
                        valid = value instanceof type;
                    }
                } else if (expectedType === 'Object') {
                    valid = isPlainObject(value);
                } else if (expectedType === 'Array') {
                    valid = Array.isArray(value);
                } else {
                    try {
                        valid = value instanceof type;
                    } catch (e) {
                        warn('Invalid prop type: "' + String(type) + '" is not a constructor', vm);
                        valid = false;
                    }
                }
                return {
                    valid: valid,
                    expectedType: expectedType
                }
            }
            var functionTypeCheckRE = /^\s*function (\w+)/;
            /**
             * Use function string name to check built-in types,
             * because a simple equality check will fail when running
             * across different vms / iframes.
             */
            function getType(fn) {
                var match = fn && fn.toString().match(functionTypeCheckRE);
                return match ? match[1] : ''
            }

            function isSameType(a, b) {
                return getType(a) === getType(b)
            }

            function getTypeIndex(type, expectedTypes) {
                if (!Array.isArray(expectedTypes)) {
                    return isSameType(expectedTypes, type) ? 0 : -1
                }
                for (var i = 0, len = expectedTypes.length; i < len; i++) {
                    if (isSameType(expectedTypes[i], type)) {
                        return i
                    }
                }
                return -1
            }

            function getInvalidTypeMessage(name, value, expectedTypes) {
                var message = "Invalid prop: type check failed for prop \"" + name + "\"." + " Expected " + (
                    expectedTypes.map(capitalize).join(', '));
                var expectedType = expectedTypes[0];
                var receivedType = toRawType(value);
                // check if we need to specify expected value
                if (expectedTypes.length === 1 && isExplicable(expectedType) && isExplicable(typeof value) && !
                    isBoolean(expectedType, receivedType)) {
                    message += " with value " + (styleValue(value, expectedType));
                }
                message += ", got " + receivedType + " ";
                // check if we need to specify received value
                if (isExplicable(receivedType)) {
                    message += "with value " + (styleValue(value, receivedType)) + ".";
                }
                return message
            }

            function styleValue(value, type) {
                if (type === 'String') {
                    return ("\"" + value + "\"")
                } else if (type === 'Number') {
                    return ("" + (Number(value)))
                } else {
                    return ("" + value)
                }
            }
            var EXPLICABLE_TYPES = ['string', 'number', 'boolean'];

            function isExplicable(value) {
                return EXPLICABLE_TYPES.some(function(elem) {
                    return value.toLowerCase() === elem;
                })
            }

            function isBoolean() {
                var args = [],
                    len = arguments.length;
                while (len--) args[len] = arguments[len];
                return args.some(function(elem) {
                    return elem.toLowerCase() === 'boolean';
                })
            }
            /*  */
            function handleError(err, vm, info) {
                // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
                // See: https://github.com/vuejs/vuex/issues/1505
                pushTarget();
                try {
                    if (vm) {
                        var cur = vm;
                        while ((cur = cur.$parent)) {
                            var hooks = cur.$options.errorCaptured;
                            if (hooks) {
                                for (var i = 0; i < hooks.length; i++) {
                                    try {
                                        var capture = hooks[i].call(cur, err, vm, info) === false;
                                        if (capture) {
                                            return
                                        }
                                    } catch (e) {
                                        globalHandleError(e, cur, 'errorCaptured hook');
                                    }
                                }
                            }
                        }
                    }
                    globalHandleError(err, vm, info);
                } finally {
                    popTarget();
                }
            }

            function invokeWithErrorHandling(handler, context, args, vm, info) {
                var res;
                try {
                    res = args ? handler.apply(context, args) : handler.call(context);
                    if (res && !res._isVue && isPromise(res) && !res._handled) {
                        res.catch(function(e) {
                            return handleError(e, vm, info + " (Promise/async)");
                        });
                        // issue #9511
                        // avoid catch triggering multiple times when nested calls
                        res._handled = true;
                    }
                } catch (e) {
                    handleError(e, vm, info);
                }
                return res
            }

            function globalHandleError(err, vm, info) {
                if (config.errorHandler) {
                    try {
                        return config.errorHandler.call(null, err, vm, info)
                    } catch (e) {
                        // if the user intentionally throws the original error in the handler,
                        // do not log it twice
                        if (e !== err) {
                            logError(e, null, 'config.errorHandler');
                        }
                    }
                }
                logError(err, vm, info);
            }

            function logError(err, vm, info) {
                {
                    warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
                }
                /* istanbul ignore else */
                if ((inBrowser || inWeex) && typeof console !== 'undefined') {
                    console.error(err);
                } else {
                    throw err
                }
            }
            /*  */
            var isUsingMicroTask = false;
            var callbacks = [];
            var pending = false;

            function flushCallbacks() {
                pending = false;
                var copies = callbacks.slice(0);
                callbacks.length = 0;
                for (var i = 0; i < copies.length; i++) {
                    copies[i]();
                }
            }
            // Here we have async deferring wrappers using microtasks.
            // In 2.5 we used (macro) tasks (in combination with microtasks).
            // However, it has subtle problems when state is changed right before repaint
            // (e.g. #6813, out-in transitions).
            // Also, using (macro) tasks in event handler would cause some weird behaviors
            // that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
            // So we now use microtasks everywhere, again.
            // A major drawback of this tradeoff is that there are some scenarios
            // where microtasks have too high a priority and fire in between supposedly
            // sequential events (e.g. #4521, #6690, which have workarounds)
            // or even between bubbling of the same event (#6566).
            var timerFunc;
            // The nextTick behavior leverages the microtask queue, which can be accessed
            // via either native Promise.then or MutationObserver.
            // MutationObserver has wider support, however it is seriously bugged in
            // UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
            // completely stops working after triggering a few times... so, if native
            // Promise is available, we will use it:
            /* istanbul ignore next, $flow-disable-line */
            if (typeof Promise !== 'undefined' && isNative(Promise)) {
                var p = Promise.resolve();
                timerFunc = function() {
                    p.then(flushCallbacks);
                    // In problematic UIWebViews, Promise.then doesn't completely break, but
                    // it can get stuck in a weird state where callbacks are pushed into the
                    // microtask queue but the queue isn't being flushed, until the browser
                    // needs to do some other work, e.g. handle a timer. Therefore we can
                    // "force" the microtask queue to be flushed by adding an empty timer.
                    if (isIOS) {
                        setTimeout(noop);
                    }
                };
                isUsingMicroTask = true;
            } else if (!isIE && typeof MutationObserver !== 'undefined' && (isNative(MutationObserver) ||
                // PhantomJS and iOS 7.x
                MutationObserver.toString() === '[object MutationObserverConstructor]')) {
                // Use MutationObserver where native Promise is not available,
                // e.g. PhantomJS, iOS7, Android 4.4
                // (#6466 MutationObserver is unreliable in IE11)
                var counter = 1;
                var observer = new MutationObserver(flushCallbacks);
                var textNode = document.createTextNode(String(counter));
                observer.observe(textNode, {
                    characterData: true
                });
                timerFunc = function() {
                    counter = (counter + 1) % 2;
                    textNode.data = String(counter);
                };
                isUsingMicroTask = true;
            } else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
                // Fallback to setImmediate.
                // Technically it leverages the (macro) task queue,
                // but it is still a better choice than setTimeout.
                timerFunc = function() {
                    setImmediate(flushCallbacks);
                };
            } else {
                // Fallback to setTimeout.
                timerFunc = function() {
                    setTimeout(flushCallbacks, 0);
                };
            }

            function nextTick(cb, ctx) {
                var _resolve;
                callbacks.push(function() {
                    if (cb) {
                        try {
                            cb.call(ctx);
                        } catch (e) {
                            handleError(e, ctx, 'nextTick');
                        }
                    } else if (_resolve) {
                        _resolve(ctx);
                    }
                });
                if (!pending) {
                    pending = true;
                    timerFunc();
                }
                // $flow-disable-line
                if (!cb && typeof Promise !== 'undefined') {
                    return new Promise(function(resolve) {
                        _resolve = resolve;
                    })
                }
            }
            /*  */
            var mark;
            var measure; {
                var perf = inBrowser && window.performance;
                /* istanbul ignore if */
                if (perf && perf.mark && perf.measure && perf.clearMarks && perf.clearMeasures) {
                    mark = function(tag) {
                        return perf.mark(tag);
                    };
                    measure = function(name, startTag, endTag) {
                        perf.measure(name, startTag, endTag);
                        perf.clearMarks(startTag);
                        perf.clearMarks(endTag);
                        // perf.clearMeasures(name)
                    };
                }
            }
            /* not type checking this file because flow doesn't play well with Proxy */
            var initProxy; {
                var allowedGlobals = makeMap('Infinity,undefined,NaN,isFinite,isNaN,' +
                    'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
                    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,BigInt,' +
                    'require' // for Webpack/Browserify
                );
                var warnNonPresent = function(target, key) {
                    warn("Property or method \"" + key + "\" is not defined on the instance but " +
                        'referenced during render. Make sure that this property is reactive, ' +
                        'either in the data option, or for class-based components, by ' +
                        'initializing the property. ' +
                        'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
                        target);
                };
                var warnReservedPrefix = function(target, key) {
                    warn("Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " +
                        'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
                        'prevent conflicts with Vue internals. ' + 'See: https://vuejs.org/v2/api/#data',
                        target);
                };
                var hasProxy = typeof Proxy !== 'undefined' && isNative(Proxy);
                if (hasProxy) {
                    var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
                    config.keyCodes = new Proxy(config.keyCodes, {
                        set: function set(target, key, value) {
                            if (isBuiltInModifier(key)) {
                                warn(("Avoid overwriting built-in modifier in config.keyCodes: ." +
                                    key));
                                return false
                            } else {
                                target[key] = value;
                                return true
                            }
                        }
                    });
                }
                var hasHandler = {
                    has: function has(target, key) {
                        var has = key in target;
                        var isAllowed = allowedGlobals(key) || (typeof key === 'string' && key.charAt(0) ===
                            '_' && !(key in target.$data));
                        if (!has && !isAllowed) {
                            if (key in target.$data) {
                                warnReservedPrefix(target, key);
                            } else {
                                warnNonPresent(target, key);
                            }
                        }
                        return has || !isAllowed
                    }
                };
                var getHandler = {
                    get: function get(target, key) {
                        if (typeof key === 'string' && !(key in target)) {
                            if (key in target.$data) {
                                warnReservedPrefix(target, key);
                            } else {
                                warnNonPresent(target, key);
                            }
                        }
                        return target[key]
                    }
                };
                initProxy = function initProxy(vm) {
                    if (hasProxy) {
                        // determine which proxy handler to use
                        var options = vm.$options;
                        var handlers = options.render && options.render._withStripped ? getHandler : hasHandler;
                        vm._renderProxy = new Proxy(vm, handlers);
                    } else {
                        vm._renderProxy = vm;
                    }
                };
            }
            /*  */
            var seenObjects = new _Set();
            /**
             * Recursively traverse an object to evoke all converted
             * getters, so that every nested property inside the object
             * is collected as a "deep" dependency.
             */
            function traverse(val) {
                _traverse(val, seenObjects);
                seenObjects.clear();
            }

            function _traverse(val, seen) {
                var i, keys;
                var isA = Array.isArray(val);
                if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
                    return
                }
                if (val.__ob__) {
                    var depId = val.__ob__.dep.id;
                    if (seen.has(depId)) {
                        return
                    }
                    seen.add(depId);
                }
                if (isA) {
                    i = val.length;
                    while (i--) {
                        _traverse(val[i], seen);
                    }
                } else {
                    keys = Object.keys(val);
                    i = keys.length;
                    while (i--) {
                        _traverse(val[keys[i]], seen);
                    }
                }
            }
            /*  */
            var normalizeEvent = cached(function(name) {
                var passive = name.charAt(0) === '&';
                name = passive ? name.slice(1) : name;
                var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
                name = once$$1 ? name.slice(1) : name;
                var capture = name.charAt(0) === '!';
                name = capture ? name.slice(1) : name;
                return {
                    name: name,
                    once: once$$1,
                    capture: capture,
                    passive: passive
                }
            });

            function createFnInvoker(fns, vm) {
                function invoker() {
                    var arguments$1 = arguments;
                    var fns = invoker.fns;
                    if (Array.isArray(fns)) {
                        var cloned = fns.slice();
                        for (var i = 0; i < cloned.length; i++) {
                            invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
                        }
                    } else {
                        // return handler return value for single handlers
                        return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")
                    }
                }
                invoker.fns = fns;
                return invoker
            }

            function updateListeners(on, oldOn, add, remove$$1, createOnceHandler, vm) {
                var name, def$$1, cur, old, event;
                for (name in on) {
                    def$$1 = cur = on[name];
                    old = oldOn[name];
                    event = normalizeEvent(name);
                    if (isUndef(cur)) {
                        warn("Invalid handler for event \"" + (event.name) + "\": got " + String(cur), vm);
                    } else if (isUndef(old)) {
                        if (isUndef(cur.fns)) {
                            cur = on[name] = createFnInvoker(cur, vm);
                        }
                        if (isTrue(event.once)) {
                            cur = on[name] = createOnceHandler(event.name, cur, event.capture);
                        }
                        add(event.name, cur, event.capture, event.passive, event.params);
                    } else if (cur !== old) {
                        old.fns = cur;
                        on[name] = old;
                    }
                }
                for (name in oldOn) {
                    if (isUndef(on[name])) {
                        event = normalizeEvent(name);
                        remove$$1(event.name, oldOn[name], event.capture);
                    }
                }
            }
            /*  */
            function mergeVNodeHook(def, hookKey, hook) {
                if (def instanceof VNode) {
                    def = def.data.hook || (def.data.hook = {});
                }
                var invoker;
                var oldHook = def[hookKey];

                function wrappedHook() {
                    hook.apply(this, arguments);
                    // important: remove merged hook to ensure it's called only once
                    // and prevent memory leak
                    remove(invoker.fns, wrappedHook);
                }
                if (isUndef(oldHook)) {
                    // no existing hook
                    invoker = createFnInvoker([wrappedHook]);
                } else {
                    /* istanbul ignore if */
                    if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
                        // already a merged invoker
                        invoker = oldHook;
                        invoker.fns.push(wrappedHook);
                    } else {
                        // existing plain hook
                        invoker = createFnInvoker([oldHook, wrappedHook]);
                    }
                }
                invoker.merged = true;
                def[hookKey] = invoker;
            }
            /*  */
            function extractPropsFromVNodeData(data, Ctor, tag) {
                // we are only extracting raw values here.
                // validation and default values are handled in the child
                // component itself.
                var propOptions = Ctor.options.props;
                if (isUndef(propOptions)) {
                    return
                }
                var res = {};
                var attrs = data.attrs;
                var props = data.props;
                if (isDef(attrs) || isDef(props)) {
                    for (var key in propOptions) {
                        var altKey = hyphenate(key); {
                            var keyInLowerCase = key.toLowerCase();
                            if (key !== keyInLowerCase && attrs && hasOwn(attrs, keyInLowerCase)) {
                                tip("Prop \"" + keyInLowerCase + "\" is passed to component " + (formatComponentName(
                                    tag || Ctor)) + ", but the declared prop name is" + " \"" + key +
                                    "\". " + "Note that HTML attributes are case-insensitive and camelCased " +
                                    "props need to use their kebab-case equivalents when using in-DOM " +
                                    "templates. You should probably use \"" + altKey + "\" instead of \"" + key +
                                    "\".");
                            }
                        }
                        checkProp(res, props, key, altKey, true) || checkProp(res, attrs, key, altKey, false);
                    }
                }
                return res
            }

            function checkProp(res, hash, key, altKey, preserve) {
                if (isDef(hash)) {
                    if (hasOwn(hash, key)) {
                        res[key] = hash[key];
                        if (!preserve) {
                            delete hash[key];
                        }
                        return true
                    } else if (hasOwn(hash, altKey)) {
                        res[key] = hash[altKey];
                        if (!preserve) {
                            delete hash[altKey];
                        }
                        return true
                    }
                }
                return false
            }
            /*  */
            // The template compiler attempts to minimize the need for normalization by
            // statically analyzing the template at compile time.
            //
            // For plain HTML markup, normalization can be completely skipped because the
            // generated render function is guaranteed to return Array<VNode>. There are
            // two cases where extra normalization is needed:
            // 1. When the children contains components - because a functional component
            // may return an Array instead of a single root. In this case, just a simple
            // normalization is needed - if any child is an Array, we flatten the whole
            // thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
            // because functional components already normalize their own children.
            function simpleNormalizeChildren(children) {
                for (var i = 0; i < children.length; i++) {
                    if (Array.isArray(children[i])) {
                        return Array.prototype.concat.apply([], children)
                    }
                }
                return children
            }
            // 2. When the children contains constructs that always generated nested Arrays,
            // e.g. <template>, <slot>, v-for, or when the children is provided by user
            // with hand-written render functions / JSX. In such cases a full normalization
            // is needed to cater to all possible types of children values.
            function normalizeChildren(children) {
                return isPrimitive(children) ? [createTextVNode(children)] : Array.isArray(children) ?
                    normalizeArrayChildren(children) : undefined
            }

            function isTextNode(node) {
                return isDef(node) && isDef(node.text) && isFalse(node.isComment)
            }

            function normalizeArrayChildren(children, nestedIndex) {
                var res = [];
                var i, c, lastIndex, last;
                for (i = 0; i < children.length; i++) {
                    c = children[i];
                    if (isUndef(c) || typeof c === 'boolean') {
                        continue
                    }
                    lastIndex = res.length - 1;
                    last = res[lastIndex];
                    //  nested
                    if (Array.isArray(c)) {
                        if (c.length > 0) {
                            c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
                            // merge adjacent text nodes
                            if (isTextNode(c[0]) && isTextNode(last)) {
                                res[lastIndex] = createTextVNode(last.text + (c[0]).text);
                                c.shift();
                            }
                            res.push.apply(res, c);
                        }
                    } else if (isPrimitive(c)) {
                        if (isTextNode(last)) {
                            // merge adjacent text nodes
                            // this is necessary for SSR hydration because text nodes are
                            // essentially merged when rendered to HTML strings
                            res[lastIndex] = createTextVNode(last.text + c);
                        } else if (c !== '') {
                            // convert primitive to vnode
                            res.push(createTextVNode(c));
                        }
                    } else {
                        if (isTextNode(c) && isTextNode(last)) {
                            // merge adjacent text nodes
                            res[lastIndex] = createTextVNode(last.text + c.text);
                        } else {
                            // default key for nested array children (likely generated by v-for)
                            if (isTrue(children._isVList) && isDef(c.tag) && isUndef(c.key) && isDef(nestedIndex)) {
                                c.key = "__vlist" + nestedIndex + "_" + i + "__";
                            }
                            res.push(c);
                        }
                    }
                }
                return res
            }
            /*  */
            function initProvide(vm) {
                var provide = vm.$options.provide;
                if (provide) {
                    vm._provided = typeof provide === 'function' ? provide.call(vm) : provide;
                }
            }

            function initInjections(vm) {
                var result = resolveInject(vm.$options.inject, vm);
                if (result) {
                    toggleObserving(false);
                    Object.keys(result).forEach(function(key) {
                        /* istanbul ignore else */
                        {
                            defineReactive$$1(vm, key, result[key], function() {
                                warn("Avoid mutating an injected value directly since the changes will be " +
                                    "overwritten whenever the provided component re-renders. " +
                                    "injection being mutated: \"" + key + "\"", vm);
                            });
                        }
                    });
                    toggleObserving(true);
                }
            }

            function resolveInject(inject, vm) {
                if (inject) {
                    // inject is :any because flow is not smart enough to figure out cached
                    var result = Object.create(null);
                    var keys = hasSymbol ? Reflect.ownKeys(inject) : Object.keys(inject);
                    for (var i = 0; i < keys.length; i++) {
                        var key = keys[i];
                        // #6574 in case the inject object is observed...
                        if (key === '__ob__') {
                            continue
                        }
                        var provideKey = inject[key].from;
                        var source = vm;
                        while (source) {
                            if (source._provided && hasOwn(source._provided, provideKey)) {
                                result[key] = source._provided[provideKey];
                                break
                            }
                            source = source.$parent;
                        }
                        if (!source) {
                            if ('default' in inject[key]) {
                                var provideDefault = inject[key].default;
                                result[key] = typeof provideDefault === 'function' ? provideDefault.call(vm) :
                                    provideDefault;
                            } else {
                                warn(("Injection \"" + key + "\" not found"), vm);
                            }
                        }
                    }
                    return result
                }
            }
            /*  */
            /**
             * Runtime helper for resolving raw children VNodes into a slot object.
             */
            function resolveSlots(children, context) {
                if (!children || !children.length) {
                    return {}
                }
                var slots = {};
                for (var i = 0, l = children.length; i < l; i++) {
                    var child = children[i];
                    var data = child.data;
                    // remove slot attribute if the node is resolved as a Vue slot node
                    if (data && data.attrs && data.attrs.slot) {
                        delete data.attrs.slot;
                    }
                    // named slots should only be respected if the vnode was rendered in the
                    // same context.
                    if ((child.context === context || child.fnContext === context) && data && data.slot != null) {
                        var name = data.slot;
                        var slot = (slots[name] || (slots[name] = []));
                        if (child.tag === 'template') {
                            slot.push.apply(slot, child.children || []);
                        } else {
                            slot.push(child);
                        }
                    } else {
                        (slots.default || (slots.default = [])).push(child);
                    }
                }
                // ignore slots that contains only whitespace
                for (var name$1 in slots) {
                    if (slots[name$1].every(isWhitespace)) {
                        delete slots[name$1];
                    }
                }
                return slots
            }

            function isWhitespace(node) {
                return (node.isComment && !node.asyncFactory) || node.text === ' '
            }
            /*  */
            function isAsyncPlaceholder(node) {
                return node.isComment && node.asyncFactory
            }
            /*  */
            function normalizeScopedSlots(slots, normalSlots, prevSlots) {
                var res;
                var hasNormalSlots = Object.keys(normalSlots).length > 0;
                var isStable = slots ? !!slots.$stable : !hasNormalSlots;
                var key = slots && slots.$key;
                if (!slots) {
                    res = {};
                } else if (slots._normalized) {
                    // fast path 1: child component re-render only, parent did not change
                    return slots._normalized
                } else if (isStable && prevSlots && prevSlots !== emptyObject && key === prevSlots.$key && !
                    hasNormalSlots && !prevSlots.$hasNormal) {
                    // fast path 2: stable scoped slots w/ no normal slots to proxy,
                    // only need to normalize once
                    return prevSlots
                } else {
                    res = {};
                    for (var key$1 in slots) {
                        if (slots[key$1] && key$1[0] !== '$') {
                            res[key$1] = normalizeScopedSlot(normalSlots, key$1, slots[key$1]);
                        }
                    }
                }
                // expose normal slots on scopedSlots
                for (var key$2 in normalSlots) {
                    if (!(key$2 in res)) {
                        res[key$2] = proxyNormalSlot(normalSlots, key$2);
                    }
                }
                // avoriaz seems to mock a non-extensible $scopedSlots object
                // and when that is passed down this would cause an error
                if (slots && Object.isExtensible(slots)) {
                    (slots)._normalized = res;
                }
                def(res, '$stable', isStable);
                def(res, '$key', key);
                def(res, '$hasNormal', hasNormalSlots);
                return res
            }

            function normalizeScopedSlot(normalSlots, key, fn) {
                var normalized = function() {
                    var res = arguments.length ? fn.apply(null, arguments) : fn({});
                    res = res && typeof res === 'object' && !Array.isArray(res) ? [res] // single vnode
                        : normalizeChildren(res);
                    var vnode = res && res[0];
                    return res && (!vnode || (res.length === 1 && vnode.isComment && !isAsyncPlaceholder(
                            vnode)) // #9658, #10391
                    ) ? undefined : res
                };
                // this is a slot using the new v-slot syntax without scope. although it is
                // compiled as a scoped slot, render fn users would expect it to be present
                // on this.$slots because the usage is semantically a normal slot.
                if (fn.proxy) {
                    Object.defineProperty(normalSlots, key, {
                        get: normalized,
                        enumerable: true,
                        configurable: true
                    });
                }
                return normalized
            }

            function proxyNormalSlot(slots, key) {
                return function() {
                    return slots[key];
                }
            }
            /*  */
            /**
             * Runtime helper for rendering v-for lists.
             */
            function renderList(val, render) {
                var ret, i, l, keys, key;
                if (Array.isArray(val) || typeof val === 'string') {
                    ret = new Array(val.length);
                    for (i = 0, l = val.length; i < l; i++) {
                        ret[i] = render(val[i], i);
                    }
                } else if (typeof val === 'number') {
                    ret = new Array(val);
                    for (i = 0; i < val; i++) {
                        ret[i] = render(i + 1, i);
                    }
                } else if (isObject(val)) {
                    if (hasSymbol && val[Symbol.iterator]) {
                        ret = [];
                        var iterator = val[Symbol.iterator]();
                        var result = iterator.next();
                        while (!result.done) {
                            ret.push(render(result.value, ret.length));
                            result = iterator.next();
                        }
                    } else {
                        keys = Object.keys(val);
                        ret = new Array(keys.length);
                        for (i = 0, l = keys.length; i < l; i++) {
                            key = keys[i];
                            ret[i] = render(val[key], key, i);
                        }
                    }
                }
                if (!isDef(ret)) {
                    ret = [];
                }
                (ret)._isVList = true;
                return ret
            }
            /*  */
            /**
             * Runtime helper for rendering <slot>
             */
            function renderSlot(name, fallbackRender, props, bindObject) {
                var scopedSlotFn = this.$scopedSlots[name];
                var nodes;
                if (scopedSlotFn) {
                    // scoped slot
                    props = props || {};
                    if (bindObject) {
                        if (!isObject(bindObject)) {
                            warn('slot v-bind without argument expects an Object', this);
                        }
                        props = extend(extend({}, bindObject), props);
                    }
                    nodes = scopedSlotFn(props) || (typeof fallbackRender === 'function' ? fallbackRender() :
                        fallbackRender);
                } else {
                    nodes = this.$slots[name] || (typeof fallbackRender === 'function' ? fallbackRender() :
                        fallbackRender);
                }
                var target = props && props.slot;
                if (target) {
                    return this.$createElement('template', {
                        slot: target
                    }, nodes)
                } else {
                    return nodes
                }
            }
            /*  */
            /**
             * Runtime helper for resolving filters
             */
            function resolveFilter(id) {
                return resolveAsset(this.$options, 'filters', id, true) || identity
            }
            /*  */
            function isKeyNotMatch(expect, actual) {
                if (Array.isArray(expect)) {
                    return expect.indexOf(actual) === -1
                } else {
                    return expect !== actual
                }
            }
            /**
             * Runtime helper for checking keyCodes from config.
             * exposed as Vue.prototype._k
             * passing in eventKeyName as last argument separately for backwards compat
             */
            function checkKeyCodes(eventKeyCode, key, builtInKeyCode, eventKeyName, builtInKeyName) {
                var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
                if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
                    return isKeyNotMatch(builtInKeyName, eventKeyName)
                } else if (mappedKeyCode) {
                    return isKeyNotMatch(mappedKeyCode, eventKeyCode)
                } else if (eventKeyName) {
                    return hyphenate(eventKeyName) !== key
                }
                return eventKeyCode === undefined
            }
            /*  */
            /**
             * Runtime helper for merging v-bind="object" into a VNode's data.
             */
            function bindObjectProps(data, tag, value, asProp, isSync) {
                if (value) {
                    if (!isObject(value)) {
                        warn('v-bind without argument expects an Object or Array value', this);
                    } else {
                        if (Array.isArray(value)) {
                            value = toObject(value);
                        }
                        var hash;
                        var loop = function(key) {
                            if (key === 'class' || key === 'style' || isReservedAttribute(key)) {
                                hash = data;
                            } else {
                                var type = data.attrs && data.attrs.type;
                                hash = asProp || config.mustUseProp(tag, type, key) ? data.domProps || (data
                                    .domProps = {}) : data.attrs || (data.attrs = {});
                            }
                            var camelizedKey = camelize(key);
                            var hyphenatedKey = hyphenate(key);
                            if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
                                hash[key] = value[key];
                                if (isSync) {
                                    var on = data.on || (data.on = {});
                                    on[("update:" + key)] = function($event) {
                                        value[key] = $event;
                                    };
                                }
                            }
                        };
                        for (var key in value) loop(key);
                    }
                }
                return data
            }
            /*  */
            /**
             * Runtime helper for rendering static trees.
             */
            function renderStatic(index, isInFor) {
                var cached = this._staticTrees || (this._staticTrees = []);
                var tree = cached[index];
                // if has already-rendered static tree and not inside v-for,
                // we can reuse the same tree.
                if (tree && !isInFor) {
                    return tree
                }
                // otherwise, render a fresh tree.
                tree = cached[index] = this.$options.staticRenderFns[index].call(this._renderProxy, null,
                    this // for render fns generated for functional component templates
                );
                markStatic(tree, ("__static__" + index), false);
                return tree
            }
            /**
             * Runtime helper for v-once.
             * Effectively it means marking the node as static with a unique key.
             */
            function markOnce(tree, index, key) {
                markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
                return tree
            }

            function markStatic(tree, key, isOnce) {
                if (Array.isArray(tree)) {
                    for (var i = 0; i < tree.length; i++) {
                        if (tree[i] && typeof tree[i] !== 'string') {
                            markStaticNode(tree[i], (key + "_" + i), isOnce);
                        }
                    }
                } else {
                    markStaticNode(tree, key, isOnce);
                }
            }

            function markStaticNode(node, key, isOnce) {
                node.isStatic = true;
                node.key = key;
                node.isOnce = isOnce;
            }
            /*  */
            function bindObjectListeners(data, value) {
                if (value) {
                    if (!isPlainObject(value)) {
                        warn('v-on without argument expects an Object value', this);
                    } else {
                        var on = data.on = data.on ? extend({}, data.on) : {};
                        for (var key in value) {
                            var existing = on[key];
                            var ours = value[key];
                            on[key] = existing ? [].concat(existing, ours) : ours;
                        }
                    }
                }
                return data
            }
            /*  */
            function resolveScopedSlots(fns, // see flow/vnode
                                        res,
                                        // the following are added in 2.6
                                        hasDynamicKeys, contentHashKey) {
                res = res || {
                    $stable: !hasDynamicKeys
                };
                for (var i = 0; i < fns.length; i++) {
                    var slot = fns[i];
                    if (Array.isArray(slot)) {
                        resolveScopedSlots(slot, res, hasDynamicKeys);
                    } else if (slot) {
                        // marker for reverse proxying v-slot without scope on this.$slots
                        if (slot.proxy) {
                            slot.fn.proxy = true;
                        }
                        res[slot.key] = slot.fn;
                    }
                }
                if (contentHashKey) {
                    (res).$key = contentHashKey;
                }
                return res
            }
            /*  */
            function bindDynamicKeys(baseObj, values) {
                for (var i = 0; i < values.length; i += 2) {
                    var key = values[i];
                    if (typeof key === 'string' && key) {
                        baseObj[values[i]] = values[i + 1];
                    } else if (key !== '' && key !== null) {
                        // null is a special value for explicitly removing a binding
                        warn(
                            ("Invalid value for dynamic directive argument (expected string or null): " + key),
                            this);
                    }
                }
                return baseObj
            }
            // helper to dynamically append modifier runtime markers to event names.
            // ensure only append when value is already string, otherwise it will be cast
            // to string and cause the type check to miss.
            function prependModifier(value, symbol) {
                return typeof value === 'string' ? symbol + value : value
            }
            /*  */
            function installRenderHelpers(target) {
                target._o = markOnce;
                target._n = toNumber;
                target._s = toString;
                target._l = renderList;
                target._t = renderSlot;
                target._q = looseEqual;
                target._i = looseIndexOf;
                target._m = renderStatic;
                target._f = resolveFilter;
                target._k = checkKeyCodes;
                target._b = bindObjectProps;
                target._v = createTextVNode;
                target._e = createEmptyVNode;
                target._u = resolveScopedSlots;
                target._g = bindObjectListeners;
                target._d = bindDynamicKeys;
                target._p = prependModifier;
            }
            /*  */
            function FunctionalRenderContext(data, props, children, parent, Ctor) {
                var this$1 = this;
                var options = Ctor.options;
                // ensure the createElement function in functional components
                // gets a unique context - this is necessary for correct named slot check
                var contextVm;
                if (hasOwn(parent, '_uid')) {
                    contextVm = Object.create(parent);
                    // $flow-disable-line
                    contextVm._original = parent;
                } else {
                    // the context vm passed in is a functional context as well.
                    // in this case we want to make sure we are able to get a hold to the
                    // real context instance.
                    contextVm = parent;
                    // $flow-disable-line
                    parent = parent._original;
                }
                var isCompiled = isTrue(options._compiled);
                var needNormalization = !isCompiled;
                this.data = data;
                this.props = props;
                this.children = children;
                this.parent = parent;
                this.listeners = data.on || emptyObject;
                this.injections = resolveInject(options.inject, parent);
                this.slots = function() {
                    if (!this$1.$slots) {
                        normalizeScopedSlots(data.scopedSlots, this$1.$slots = resolveSlots(children, parent));
                    }
                    return this$1.$slots
                };
                Object.defineProperty(this, 'scopedSlots', ({
                    enumerable: true,
                    get: function get() {
                        return normalizeScopedSlots(data.scopedSlots, this.slots())
                    }
                }));
                // support for compiled functional template
                if (isCompiled) {
                    // exposing $options for renderStatic()
                    this.$options = options;
                    // pre-resolve slots for renderSlot()
                    this.$slots = this.slots();
                    this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
                }
                if (options._scopeId) {
                    this._c = function(a, b, c, d) {
                        var vnode = createElement(contextVm, a, b, c, d, needNormalization);
                        if (vnode && !Array.isArray(vnode)) {
                            vnode.fnScopeId = options._scopeId;
                            vnode.fnContext = parent;
                        }
                        return vnode
                    };
                } else {
                    this._c = function(a, b, c, d) {
                        return createElement(contextVm, a, b, c, d, needNormalization);
                    };
                }
            }
            installRenderHelpers(FunctionalRenderContext.prototype);

            function createFunctionalComponent(Ctor, propsData, data, contextVm, children) {
                var options = Ctor.options;
                var props = {};
                var propOptions = options.props;
                if (isDef(propOptions)) {
                    for (var key in propOptions) {
                        props[key] = validateProp(key, propOptions, propsData || emptyObject);
                    }
                } else {
                    if (isDef(data.attrs)) {
                        mergeProps(props, data.attrs);
                    }
                    if (isDef(data.props)) {
                        mergeProps(props, data.props);
                    }
                }
                var renderContext = new FunctionalRenderContext(data, props, children, contextVm, Ctor);
                var vnode = options.render.call(null, renderContext._c, renderContext);
                if (vnode instanceof VNode) {
                    return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
                } else if (Array.isArray(vnode)) {
                    var vnodes = normalizeChildren(vnode) || [];
                    var res = new Array(vnodes.length);
                    for (var i = 0; i < vnodes.length; i++) {
                        res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options,
                            renderContext);
                    }
                    return res
                }
            }

            function cloneAndMarkFunctionalResult(vnode, data, contextVm, options, renderContext) {
                // #7817 clone node before setting fnContext, otherwise if the node is reused
                // (e.g. it was from a cached normal slot) the fnContext causes named slots
                // that should not be matched to match.
                var clone = cloneVNode(vnode);
                clone.fnContext = contextVm;
                clone.fnOptions = options; {
                    (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
                }
                if (data.slot) {
                    (clone.data || (clone.data = {})).slot = data.slot;
                }
                return clone
            }

            function mergeProps(to, from) {
                for (var key in from) {
                    to[camelize(key)] = from[key];
                }
            }
            /*  */
            /*  */
            /*  */
            /*  */
            // inline hooks to be invoked on component VNodes during patch
            var componentVNodeHooks = {
                init: function init(vnode, hydrating) {
                    if (vnode.componentInstance && !vnode.componentInstance._isDestroyed && vnode.data
                        .keepAlive) {
                        // kept-alive components, treat as a patch
                        var mountedNode = vnode; // work around flow
                        componentVNodeHooks.prepatch(mountedNode, mountedNode);
                    } else {
                        var child = vnode.componentInstance = createComponentInstanceForVnode(vnode,
                            activeInstance);
                        child.$mount(hydrating ? vnode.elm : undefined, hydrating);
                    }
                },
                prepatch: function prepatch(oldVnode, vnode) {
                    var options = vnode.componentOptions;
                    var child = vnode.componentInstance = oldVnode.componentInstance;
                    updateChildComponent(child, options.propsData, // updated props
                        options.listeners, // updated listeners
                        vnode, // new parent vnode
                        options.children // new children
                    );
                },
                insert: function insert(vnode) {
                    var context = vnode.context;
                    var componentInstance = vnode.componentInstance;
                    if (!componentInstance._isMounted) {
                        componentInstance._isMounted = true;
                        callHook(componentInstance, 'mounted');
                    }
                    if (vnode.data.keepAlive) {
                        if (context._isMounted) {
                            // vue-router#1212
                            // During updates, a kept-alive component's child components may
                            // change, so directly walking the tree here may call activated hooks
                            // on incorrect children. Instead we push them into a queue which will
                            // be processed after the whole patch process ended.
                            queueActivatedComponent(componentInstance);
                        } else {
                            activateChildComponent(componentInstance, true /* direct */ );
                        }
                    }
                },
                destroy: function destroy(vnode) {
                    var componentInstance = vnode.componentInstance;
                    if (!componentInstance._isDestroyed) {
                        if (!vnode.data.keepAlive) {
                            componentInstance.$destroy();
                        } else {
                            deactivateChildComponent(componentInstance, true /* direct */ );
                        }
                    }
                }
            };
            var hooksToMerge = Object.keys(componentVNodeHooks);

            function createComponent(Ctor, data, context, children, tag) {
                if (isUndef(Ctor)) {
                    return
                }
                var baseCtor = context.$options._base;
                // plain options object: turn it into a constructor
                if (isObject(Ctor)) {
                    Ctor = baseCtor.extend(Ctor);
                }
                // if at this stage it's not a constructor or an async component factory,
                // reject.
                if (typeof Ctor !== 'function') {
                    {
                        warn(("Invalid Component definition: " + (String(Ctor))), context);
                    }
                    return
                }
                // async component
                var asyncFactory;
                if (isUndef(Ctor.cid)) {
                    asyncFactory = Ctor;
                    Ctor = resolveAsyncComponent(asyncFactory, baseCtor);
                    if (Ctor === undefined) {
                        // return a placeholder node for async component, which is rendered
                        // as a comment node but preserves all the raw information for the node.
                        // the information will be used for async server-rendering and hydration.
                        return createAsyncPlaceholder(asyncFactory, data, context, children, tag)
                    }
                }
                data = data || {};
                // resolve constructor options in case global mixins are applied after
                // component constructor creation
                resolveConstructorOptions(Ctor);
                // transform component v-model data into props & events
                if (isDef(data.model)) {
                    transformModel(Ctor.options, data);
                }
                // extract props
                var propsData = extractPropsFromVNodeData(data, Ctor, tag);
                // functional component
                if (isTrue(Ctor.options.functional)) {
                    return createFunctionalComponent(Ctor, propsData, data, context, children)
                }
                // extract listeners, since these needs to be treated as
                // child component listeners instead of DOM listeners
                var listeners = data.on;
                // replace with listeners with .native modifier
                // so it gets processed during parent component patch.
                data.on = data.nativeOn;
                if (isTrue(Ctor.options.abstract)) {
                    // abstract components do not keep anything
                    // other than props & listeners & slot
                    // work around flow
                    var slot = data.slot;
                    data = {};
                    if (slot) {
                        data.slot = slot;
                    }
                }
                // install component management hooks onto the placeholder node
                installComponentHooks(data);
                // return a placeholder vnode
                var name = Ctor.options.name || tag;
                var vnode = new VNode(
                    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')), data, undefined, undefined,
                    undefined, context, {
                        Ctor: Ctor,
                        propsData: propsData,
                        listeners: listeners,
                        tag: tag,
                        children: children
                    }, asyncFactory);
                return vnode
            }

            function createComponentInstanceForVnode(
                // we know it's MountedComponentVNode but flow doesn't
                vnode,
                // activeInstance in lifecycle state
                parent) {
                var options = {
                    _isComponent: true,
                    _parentVnode: vnode,
                    parent: parent
                };
                // check inline-template render functions
                var inlineTemplate = vnode.data.inlineTemplate;
                if (isDef(inlineTemplate)) {
                    options.render = inlineTemplate.render;
                    options.staticRenderFns = inlineTemplate.staticRenderFns;
                }
                return new vnode.componentOptions.Ctor(options)
            }

            function installComponentHooks(data) {
                var hooks = data.hook || (data.hook = {});
                for (var i = 0; i < hooksToMerge.length; i++) {
                    var key = hooksToMerge[i];
                    var existing = hooks[key];
                    var toMerge = componentVNodeHooks[key];
                    if (existing !== toMerge && !(existing && existing._merged)) {
                        hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
                    }
                }
            }

            function mergeHook$1(f1, f2) {
                var merged = function(a, b) {
                    // flow complains about extra args which is why we use any
                    f1(a, b);
                    f2(a, b);
                };
                merged._merged = true;
                return merged
            }
            // transform component v-model info (value and callback) into
            // prop and event handler respectively.
            function transformModel(options, data) {
                var prop = (options.model && options.model.prop) || 'value';
                var event = (options.model && options.model.event) || 'input';
                (data.attrs || (data.attrs = {}))[prop] = data.model.value;
                var on = data.on || (data.on = {});
                var existing = on[event];
                var callback = data.model.callback;
                if (isDef(existing)) {
                    if (Array.isArray(existing) ? existing.indexOf(callback) === -1 : existing !== callback) {
                        on[event] = [callback].concat(existing);
                    }
                } else {
                    on[event] = callback;
                }
            }
            /*  */
            var SIMPLE_NORMALIZE = 1;
            var ALWAYS_NORMALIZE = 2;
            // wrapper function for providing a more flexible interface
            // without getting yelled at by flow
            function createElement(context, tag, data, children, normalizationType, alwaysNormalize) {
                if (Array.isArray(data) || isPrimitive(data)) {
                    normalizationType = children;
                    children = data;
                    data = undefined;
                }
                if (isTrue(alwaysNormalize)) {
                    normalizationType = ALWAYS_NORMALIZE;
                }
                return _createElement(context, tag, data, children, normalizationType)
            }

            function _createElement(context, tag, data, children, normalizationType) {
                if (isDef(data) && isDef((data).__ob__)) {
                    warn("Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
                        'Always create fresh vnode data objects in each render!', context);
                    return createEmptyVNode()
                }
                // object syntax in v-bind
                if (isDef(data) && isDef(data.is)) {
                    tag = data.is;
                }
                if (!tag) {
                    // in case of component :is set to falsy value
                    return createEmptyVNode()
                }
                // warn against non-primitive key
                if (isDef(data) && isDef(data.key) && !isPrimitive(data.key)) {
                    {
                        warn('Avoid using non-primitive value as key, ' + 'use string/number value instead.',
                            context);
                    }
                }
                // support single function children as default scoped slot
                if (Array.isArray(children) && typeof children[0] === 'function') {
                    data = data || {};
                    data.scopedSlots = {
                        default: children[0]
                    };
                    children.length = 0;
                }
                if (normalizationType === ALWAYS_NORMALIZE) {
                    children = normalizeChildren(children);
                } else if (normalizationType === SIMPLE_NORMALIZE) {
                    children = simpleNormalizeChildren(children);
                }
                var vnode, ns;
                if (typeof tag === 'string') {
                    var Ctor;
                    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
                    if (config.isReservedTag(tag)) {
                        // platform built-in elements
                        if (isDef(data) && isDef(data.nativeOn) && data.tag !== 'component') {
                            warn(
                                ("The .native modifier for v-on is only valid on components but it was used on <" +
                                    tag + ">."), context);
                        }
                        vnode = new VNode(config.parsePlatformTagName(tag), data, children, undefined, undefined,
                            context);
                    } else if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components',
                        tag))) {
                        // component
                        vnode = createComponent(Ctor, data, context, children, tag);
                    } else {
                        // unknown or unlisted namespaced elements
                        // check at runtime because it may get assigned a namespace when its
                        // parent normalizes children
                        vnode = new VNode(tag, data, children, undefined, undefined, context);
                    }
                } else {
                    // direct component options / constructor
                    vnode = createComponent(tag, data, context, children);
                }
                if (Array.isArray(vnode)) {
                    return vnode
                } else if (isDef(vnode)) {
                    if (isDef(ns)) {
                        applyNS(vnode, ns);
                    }
                    if (isDef(data)) {
                        registerDeepBindings(data);
                    }
                    return vnode
                } else {
                    return createEmptyVNode()
                }
            }

            function applyNS(vnode, ns, force) {
                vnode.ns = ns;
                if (vnode.tag === 'foreignObject') {
                    // use default namespace inside foreignObject
                    ns = undefined;
                    force = true;
                }
                if (isDef(vnode.children)) {
                    for (var i = 0, l = vnode.children.length; i < l; i++) {
                        var child = vnode.children[i];
                        if (isDef(child.tag) && (isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
                            applyNS(child, ns, force);
                        }
                    }
                }
            }
            // ref #5318
            // necessary to ensure parent re-render when deep bindings like :style and
            // :class are used on slot nodes
            function registerDeepBindings(data) {
                if (isObject(data.style)) {
                    traverse(data.style);
                }
                if (isObject(data.class)) {
                    traverse(data.class);
                }
            }
            /*  */
            function initRender(vm) {
                vm._vnode = null; // the root of the child tree
                vm._staticTrees = null; // v-once cached trees
                var options = vm.$options;
                var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
                var renderContext = parentVnode && parentVnode.context;
                vm.$slots = resolveSlots(options._renderChildren, renderContext);
                vm.$scopedSlots = emptyObject;
                // bind the createElement fn to this instance
                // so that we get proper render context inside it.
                // args order: tag, data, children, normalizationType, alwaysNormalize
                // internal version is used by render functions compiled from templates
                vm._c = function(a, b, c, d) {
                    return createElement(vm, a, b, c, d, false);
                };
                // normalization is always applied for the public version, used in
                // user-written render functions.
                vm.$createElement = function(a, b, c, d) {
                    return createElement(vm, a, b, c, d, true);
                };
                // $attrs & $listeners are exposed for easier HOC creation.
                // they need to be reactive so that HOCs using them are always updated
                var parentData = parentVnode && parentVnode.data;
                /* istanbul ignore else */
                {
                    defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, function() {
                        !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
                    }, true);
                    defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, function() {
                        !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
                    }, true);
                }
            }
            var currentRenderingInstance = null;

            function renderMixin(Vue) {
                // install runtime convenience helpers
                installRenderHelpers(Vue.prototype);
                Vue.prototype.$nextTick = function(fn) {
                    return nextTick(fn, this)
                };
                Vue.prototype._render = function() {
                    var vm = this;
                    var ref = vm.$options;
                    var render = ref.render;
                    var _parentVnode = ref._parentVnode;
                    if (_parentVnode) {
                        vm.$scopedSlots = normalizeScopedSlots(_parentVnode.data.scopedSlots, vm.$slots, vm
                            .$scopedSlots);
                    }
                    // set parent vnode. this allows render functions to have access
                    // to the data on the placeholder node.
                    vm.$vnode = _parentVnode;
                    // render self
                    var vnode;
                    try {
                        // There's no need to maintain a stack because all render fns are called
                        // separately from one another. Nested component's render fns are called
                        // when parent component is patched.
                        currentRenderingInstance = vm;
                        vnode = render.call(vm._renderProxy, vm.$createElement);
                    } catch (e) {
                        handleError(e, vm, "render");
                        // return error render result,
                        // or previous vnode to prevent render error causing blank component
                        /* istanbul ignore else */
                        if (vm.$options.renderError) {
                            try {
                                vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
                            } catch (e) {
                                handleError(e, vm, "renderError");
                                vnode = vm._vnode;
                            }
                        } else {
                            vnode = vm._vnode;
                        }
                    } finally {
                        currentRenderingInstance = null;
                    }
                    // if the returned array contains only a single node, allow it
                    if (Array.isArray(vnode) && vnode.length === 1) {
                        vnode = vnode[0];
                    }
                    // return empty vnode in case the render function errored out
                    if (!(vnode instanceof VNode)) {
                        if (Array.isArray(vnode)) {
                            warn('Multiple root nodes returned from render function. Render function ' +
                                'should return a single root node.', vm);
                        }
                        vnode = createEmptyVNode();
                    }
                    // set parent
                    vnode.parent = _parentVnode;
                    return vnode
                };
            }
            /*  */
            function ensureCtor(comp, base) {
                if (comp.__esModule || (hasSymbol && comp[Symbol.toStringTag] === 'Module')) {
                    comp = comp.default;
                }
                return isObject(comp) ? base.extend(comp) : comp
            }

            function createAsyncPlaceholder(factory, data, context, children, tag) {
                var node = createEmptyVNode();
                node.asyncFactory = factory;
                node.asyncMeta = {
                    data: data,
                    context: context,
                    children: children,
                    tag: tag
                };
                return node
            }

            function resolveAsyncComponent(factory, baseCtor) {
                if (isTrue(factory.error) && isDef(factory.errorComp)) {
                    return factory.errorComp
                }
                if (isDef(factory.resolved)) {
                    return factory.resolved
                }
                var owner = currentRenderingInstance;
                if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
                    // already pending
                    factory.owners.push(owner);
                }
                if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
                    return factory.loadingComp
                }
                if (owner && !isDef(factory.owners)) {
                    var owners = factory.owners = [owner];
                    var sync = true;
                    var timerLoading = null;
                    var timerTimeout = null;
                    (owner).$on('hook:destroyed', function() {
                        return remove(owners, owner);
                    });
                    var forceRender = function(renderCompleted) {
                        for (var i = 0, l = owners.length; i < l; i++) {
                            (owners[i]).$forceUpdate();
                        }
                        if (renderCompleted) {
                            owners.length = 0;
                            if (timerLoading !== null) {
                                clearTimeout(timerLoading);
                                timerLoading = null;
                            }
                            if (timerTimeout !== null) {
                                clearTimeout(timerTimeout);
                                timerTimeout = null;
                            }
                        }
                    };
                    var resolve = once(function(res) {
                        // cache resolved
                        factory.resolved = ensureCtor(res, baseCtor);
                        // invoke callbacks only if this is not a synchronous resolve
                        // (async resolves are shimmed as synchronous during SSR)
                        if (!sync) {
                            forceRender(true);
                        } else {
                            owners.length = 0;
                        }
                    });
                    var reject = once(function(reason) {
                        warn("Failed to resolve async component: " + (String(factory)) + (reason ? (
                            "\nReason: " + reason) : ''));
                        if (isDef(factory.errorComp)) {
                            factory.error = true;
                            forceRender(true);
                        }
                    });
                    var res = factory(resolve, reject);
                    if (isObject(res)) {
                        if (isPromise(res)) {
                            // () => Promise
                            if (isUndef(factory.resolved)) {
                                res.then(resolve, reject);
                            }
                        } else if (isPromise(res.component)) {
                            res.component.then(resolve, reject);
                            if (isDef(res.error)) {
                                factory.errorComp = ensureCtor(res.error, baseCtor);
                            }
                            if (isDef(res.loading)) {
                                factory.loadingComp = ensureCtor(res.loading, baseCtor);
                                if (res.delay === 0) {
                                    factory.loading = true;
                                } else {
                                    timerLoading = setTimeout(function() {
                                        timerLoading = null;
                                        if (isUndef(factory.resolved) && isUndef(factory.error)) {
                                            factory.loading = true;
                                            forceRender(false);
                                        }
                                    }, res.delay || 200);
                                }
                            }
                            if (isDef(res.timeout)) {
                                timerTimeout = setTimeout(function() {
                                    timerTimeout = null;
                                    if (isUndef(factory.resolved)) {
                                        reject("timeout (" + (res.timeout) + "ms)");
                                    }
                                }, res.timeout);
                            }
                        }
                    }
                    sync = false;
                    // return in case resolved synchronously
                    return factory.loading ? factory.loadingComp : factory.resolved
                }
            }
            /*  */
            function getFirstComponentChild(children) {
                if (Array.isArray(children)) {
                    for (var i = 0; i < children.length; i++) {
                        var c = children[i];
                        if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
                            return c
                        }
                    }
                }
            }
            /*  */
            /*  */
            function initEvents(vm) {
                vm._events = Object.create(null);
                vm._hasHookEvent = false;
                // init parent attached events
                var listeners = vm.$options._parentListeners;
                if (listeners) {
                    updateComponentListeners(vm, listeners);
                }
            }
            var target;

            function add(event, fn) {
                target.$on(event, fn);
            }

            function remove$1(event, fn) {
                target.$off(event, fn);
            }

            function createOnceHandler(event, fn) {
                var _target = target;
                return function onceHandler() {
                    var res = fn.apply(null, arguments);
                    if (res !== null) {
                        _target.$off(event, onceHandler);
                    }
                }
            }

            function updateComponentListeners(vm, listeners, oldListeners) {
                target = vm;
                updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
                target = undefined;
            }

            function eventsMixin(Vue) {
                var hookRE = /^hook:/;
                Vue.prototype.$on = function(event, fn) {
                    var vm = this;
                    if (Array.isArray(event)) {
                        for (var i = 0, l = event.length; i < l; i++) {
                            vm.$on(event[i], fn);
                        }
                    } else {
                        (vm._events[event] || (vm._events[event] = [])).push(fn);
                        // optimize hook:event cost by using a boolean flag marked at registration
                        // instead of a hash lookup
                        if (hookRE.test(event)) {
                            vm._hasHookEvent = true;
                        }
                    }
                    return vm
                };
                Vue.prototype.$once = function(event, fn) {
                    var vm = this;

                    function on() {
                        vm.$off(event, on);
                        fn.apply(vm, arguments);
                    }
                    on.fn = fn;
                    vm.$on(event, on);
                    return vm
                };
                Vue.prototype.$off = function(event, fn) {
                    var vm = this;
                    // all
                    if (!arguments.length) {
                        vm._events = Object.create(null);
                        return vm
                    }
                    // array of events
                    if (Array.isArray(event)) {
                        for (var i$1 = 0, l = event.length; i$1 < l; i$1++) {
                            vm.$off(event[i$1], fn);
                        }
                        return vm
                    }
                    // specific event
                    var cbs = vm._events[event];
                    if (!cbs) {
                        return vm
                    }
                    if (!fn) {
                        vm._events[event] = null;
                        return vm
                    }
                    // specific handler
                    var cb;
                    var i = cbs.length;
                    while (i--) {
                        cb = cbs[i];
                        if (cb === fn || cb.fn === fn) {
                            cbs.splice(i, 1);
                            break
                        }
                    }
                    return vm
                };
                Vue.prototype.$emit = function(event) {
                    var vm = this; {
                        var lowerCaseEvent = event.toLowerCase();
                        if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
                            tip("Event \"" + lowerCaseEvent + "\" is emitted in component " + (
                                    formatComponentName(vm)) + " but the handler is registered for \"" +
                                event + "\". " +
                                "Note that HTML attributes are case-insensitive and you cannot use " +
                                "v-on to listen to camelCase events when using in-DOM templates. " +
                                "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" +
                                event + "\".");
                        }
                    }
                    var cbs = vm._events[event];
                    if (cbs) {
                        cbs = cbs.length > 1 ? toArray(cbs) : cbs;
                        var args = toArray(arguments, 1);
                        var info = "event handler for \"" + event + "\"";
                        for (var i = 0, l = cbs.length; i < l; i++) {
                            invokeWithErrorHandling(cbs[i], vm, args, vm, info);
                        }
                    }
                    return vm
                };
            }
            /*  */
            var activeInstance = null;
            var isUpdatingChildComponent = false;

            function setActiveInstance(vm) {
                var prevActiveInstance = activeInstance;
                activeInstance = vm;
                return function() {
                    activeInstance = prevActiveInstance;
                }
            }

            function initLifecycle(vm) {
                var options = vm.$options;
                // locate first non-abstract parent
                var parent = options.parent;
                if (parent && !options.abstract) {
                    while (parent.$options.abstract && parent.$parent) {
                        parent = parent.$parent;
                    }
                    parent.$children.push(vm);
                }
                vm.$parent = parent;
                vm.$root = parent ? parent.$root : vm;
                vm.$children = [];
                vm.$refs = {};
                vm._watcher = null;
                vm._inactive = null;
                vm._directInactive = false;
                vm._isMounted = false;
                vm._isDestroyed = false;
                vm._isBeingDestroyed = false;
            }

            function lifecycleMixin(Vue) {
                Vue.prototype._update = function(vnode, hydrating) {
                    var vm = this;
                    var prevEl = vm.$el;
                    var prevVnode = vm._vnode;
                    var restoreActiveInstance = setActiveInstance(vm);
                    vm._vnode = vnode;
                    // Vue.prototype.__patch__ is injected in entry points
                    // based on the rendering backend used.
                    if (!prevVnode) {
                        // initial render
                        vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false /* removeOnly */ );
                    } else {
                        // updates
                        vm.$el = vm.__patch__(prevVnode, vnode);
                    }
                    restoreActiveInstance();
                    // update __vue__ reference
                    if (prevEl) {
                        prevEl.__vue__ = null;
                    }
                    if (vm.$el) {
                        vm.$el.__vue__ = vm;
                    }
                    // if parent is an HOC, update its $el as well
                    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
                        vm.$parent.$el = vm.$el;
                    }
                    // updated hook is called by the scheduler to ensure that children are
                    // updated in a parent's updated hook.
                };
                Vue.prototype.$forceUpdate = function() {
                    var vm = this;
                    if (vm._watcher) {
                        vm._watcher.update();
                    }
                };
                Vue.prototype.$destroy = function() {
                    var vm = this;
                    if (vm._isBeingDestroyed) {
                        return
                    }
                    callHook(vm, 'beforeDestroy');
                    vm._isBeingDestroyed = true;
                    // remove self from parent
                    var parent = vm.$parent;
                    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
                        remove(parent.$children, vm);
                    }
                    // teardown watchers
                    if (vm._watcher) {
                        vm._watcher.teardown();
                    }
                    var i = vm._watchers.length;
                    while (i--) {
                        vm._watchers[i].teardown();
                    }
                    // remove reference from data ob
                    // frozen object may not have observer.
                    if (vm._data.__ob__) {
                        vm._data.__ob__.vmCount--;
                    }
                    // call the last hook...
                    vm._isDestroyed = true;
                    // invoke destroy hooks on current rendered tree
                    vm.__patch__(vm._vnode, null);
                    // fire destroyed hook
                    callHook(vm, 'destroyed');
                    // turn off all instance listeners.
                    vm.$off();
                    // remove __vue__ reference
                    if (vm.$el) {
                        vm.$el.__vue__ = null;
                    }
                    // release circular reference (#6759)
                    if (vm.$vnode) {
                        vm.$vnode.parent = null;
                    }
                };
            }

            function mountComponent(vm, el, hydrating) {
                vm.$el = el;
                if (!vm.$options.render) {
                    vm.$options.render = createEmptyVNode; {
                        /* istanbul ignore if */
                        if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') || vm.$options.el ||
                            el) {
                            warn('You are using the runtime-only build of Vue where the template ' +
                                'compiler is not available. Either pre-compile the templates into ' +
                                'render functions, or use the compiler-included build.', vm);
                        } else {
                            warn('Failed to mount component: template or render function not defined.', vm);
                        }
                    }
                }
                callHook(vm, 'beforeMount');
                var updateComponent;
                /* istanbul ignore if */
                if (config.performance && mark) {
                    updateComponent = function() {
                        var name = vm._name;
                        var id = vm._uid;
                        var startTag = "vue-perf-start:" + id;
                        var endTag = "vue-perf-end:" + id;
                        mark(startTag);
                        var vnode = vm._render();
                        mark(endTag);
                        measure(("vue " + name + " render"), startTag, endTag);
                        mark(startTag);
                        vm._update(vnode, hydrating);
                        mark(endTag);
                        measure(("vue " + name + " patch"), startTag, endTag);
                    };
                } else {
                    updateComponent = function() {
                        vm._update(vm._render(), hydrating);
                    };
                }
                // we set this to vm._watcher inside the watcher's constructor
                // since the watcher's initial patch may call $forceUpdate (e.g. inside child
                // component's mounted hook), which relies on vm._watcher being already defined
                new Watcher(vm, updateComponent, noop, {
                    before: function before() {
                        if (vm._isMounted && !vm._isDestroyed) {
                            callHook(vm, 'beforeUpdate');
                        }
                    }
                }, true /* isRenderWatcher */ );
                hydrating = false;
                // manually mounted instance, call mounted on self
                // mounted is called for render-created child components in its inserted hook
                if (vm.$vnode == null) {
                    vm._isMounted = true;
                    callHook(vm, 'mounted');
                }
                return vm
            }

            function updateChildComponent(vm, propsData, listeners, parentVnode, renderChildren) {
                {
                    isUpdatingChildComponent = true;
                }
                // determine whether component has slot children
                // we need to do this before overwriting $options._renderChildren.
                // check if there are dynamic scopedSlots (hand-written or compiled but with
                // dynamic slot names). Static scoped slots compiled from template has the
                // "$stable" marker.
                var newScopedSlots = parentVnode.data.scopedSlots;
                var oldScopedSlots = vm.$scopedSlots;
                var hasDynamicScopedSlot = !!(
                    (newScopedSlots && !newScopedSlots.$stable) || (oldScopedSlots !== emptyObject && !
                        oldScopedSlots.$stable) || (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots
                        .$key) || (!newScopedSlots && vm.$scopedSlots.$key));
                // Any static slot children from the parent may have changed during parent's
                // update. Dynamic scoped slots may also have changed. In such cases, a forced
                // update is necessary to ensure correctness.
                var needsForceUpdate = !!(renderChildren || // has new static slots
                    vm.$options._renderChildren || // has old static slots
                    hasDynamicScopedSlot);
                vm.$options._parentVnode = parentVnode;
                vm.$vnode = parentVnode; // update vm's placeholder node without re-render
                if (vm._vnode) { // update child tree's parent
                    vm._vnode.parent = parentVnode;
                }
                vm.$options._renderChildren = renderChildren;
                // update $attrs and $listeners hash
                // these are also reactive so they may trigger child update if the child
                // used them during render
                vm.$attrs = parentVnode.data.attrs || emptyObject;
                vm.$listeners = listeners || emptyObject;
                // update props
                if (propsData && vm.$options.props) {
                    toggleObserving(false);
                    var props = vm._props;
                    var propKeys = vm.$options._propKeys || [];
                    for (var i = 0; i < propKeys.length; i++) {
                        var key = propKeys[i];
                        var propOptions = vm.$options.props; // wtf flow?
                        props[key] = validateProp(key, propOptions, propsData, vm);
                    }
                    toggleObserving(true);
                    // keep a copy of raw propsData
                    vm.$options.propsData = propsData;
                }
                // update listeners
                listeners = listeners || emptyObject;
                var oldListeners = vm.$options._parentListeners;
                vm.$options._parentListeners = listeners;
                updateComponentListeners(vm, listeners, oldListeners);
                // resolve slots + force update if has children
                if (needsForceUpdate) {
                    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
                    vm.$forceUpdate();
                } {
                    isUpdatingChildComponent = false;
                }
            }

            function isInInactiveTree(vm) {
                while (vm && (vm = vm.$parent)) {
                    if (vm._inactive) {
                        return true
                    }
                }
                return false
            }

            function activateChildComponent(vm, direct) {
                if (direct) {
                    vm._directInactive = false;
                    if (isInInactiveTree(vm)) {
                        return
                    }
                } else if (vm._directInactive) {
                    return
                }
                if (vm._inactive || vm._inactive === null) {
                    vm._inactive = false;
                    for (var i = 0; i < vm.$children.length; i++) {
                        activateChildComponent(vm.$children[i]);
                    }
                    callHook(vm, 'activated');
                }
            }

            function deactivateChildComponent(vm, direct) {
                if (direct) {
                    vm._directInactive = true;
                    if (isInInactiveTree(vm)) {
                        return
                    }
                }
                if (!vm._inactive) {
                    vm._inactive = true;
                    for (var i = 0; i < vm.$children.length; i++) {
                        deactivateChildComponent(vm.$children[i]);
                    }
                    callHook(vm, 'deactivated');
                }
            }

            function callHook(vm, hook) {
                // #7573 disable dep collection when invoking lifecycle hooks
                pushTarget();
                var handlers = vm.$options[hook];
                var info = hook + " hook";
                if (handlers) {
                    for (var i = 0, j = handlers.length; i < j; i++) {
                        invokeWithErrorHandling(handlers[i], vm, null, vm, info);
                    }
                }
                if (vm._hasHookEvent) {
                    vm.$emit('hook:' + hook);
                }
                popTarget();
            }
            /*  */
            var MAX_UPDATE_COUNT = 100;
            var queue = [];
            var activatedChildren = [];
            var has = {};
            var circular = {};
            var waiting = false;
            var flushing = false;
            var index = 0;
            /**
             * Reset the scheduler's state.
             */
            function resetSchedulerState() {
                index = queue.length = activatedChildren.length = 0;
                has = {}; {
                    circular = {};
                }
                waiting = flushing = false;
            }
            // Async edge case #6566 requires saving the timestamp when event listeners are
            // attached. However, calling performance.now() has a perf overhead especially
            // if the page has thousands of event listeners. Instead, we take a timestamp
            // every time the scheduler flushes and use that for all event listeners
            // attached during that flush.
            var currentFlushTimestamp = 0;
            // Async edge case fix requires storing an event listener's attach timestamp.
            var getNow = Date.now;
            // Determine what event timestamp the browser is using. Annoyingly, the
            // timestamp can either be hi-res (relative to page load) or low-res
            // (relative to UNIX epoch), so in order to compare time we have to use the
            // same timestamp type when saving the flush timestamp.
            // All IE versions use low-res event timestamps, and have problematic clock
            // implementations (#9632)
            if (inBrowser && !isIE) {
                var performance = window.performance;
                if (performance && typeof performance.now === 'function' && getNow() > document.createEvent('Event')
                    .timeStamp) {
                    // if the event timestamp, although evaluated AFTER the Date.now(), is
                    // smaller than it, it means the event is using a hi-res timestamp,
                    // and we need to use the hi-res version for event listener timestamps as
                    // well.
                    getNow = function() {
                        return performance.now();
                    };
                }
            }
            /**
             * Flush both queues and run the watchers.
             */
            function flushSchedulerQueue() {
                currentFlushTimestamp = getNow();
                flushing = true;
                var watcher, id;
                // Sort queue before flush.
                // This ensures that:
                // 1. Components are updated from parent to child. (because parent is always
                //    created before the child)
                // 2. A component's user watchers are run before its render watcher (because
                //    user watchers are created before the render watcher)
                // 3. If a component is destroyed during a parent component's watcher run,
                //    its watchers can be skipped.
                queue.sort(function(a, b) {
                    return a.id - b.id;
                });
                // do not cache length because more watchers might be pushed
                // as we run existing watchers
                for (index = 0; index < queue.length; index++) {
                    watcher = queue[index];
                    if (watcher.before) {
                        watcher.before();
                    }
                    id = watcher.id;
                    has[id] = null;
                    watcher.run();
                    // in dev build, check and stop circular updates.
                    if (has[id] != null) {
                        circular[id] = (circular[id] || 0) + 1;
                        if (circular[id] > MAX_UPDATE_COUNT) {
                            warn('You may have an infinite update loop ' + (watcher.user ? (
                                "in watcher with expression \"" + (watcher.expression) + "\"") :
                                "in a component render function."), watcher.vm);
                            break
                        }
                    }
                }
                // keep copies of post queues before resetting state
                var activatedQueue = activatedChildren.slice();
                var updatedQueue = queue.slice();
                resetSchedulerState();
                // call component updated and activated hooks
                callActivatedHooks(activatedQueue);
                callUpdatedHooks(updatedQueue);
                // devtool hook
                /* istanbul ignore if */
                if (devtools && config.devtools) {
                    devtools.emit('flush');
                }
            }

            function callUpdatedHooks(queue) {
                var i = queue.length;
                while (i--) {
                    var watcher = queue[i];
                    var vm = watcher.vm;
                    if (vm._watcher === watcher && vm._isMounted && !vm._isDestroyed) {
                        callHook(vm, 'updated');
                    }
                }
            }
            /**
             * Queue a kept-alive component that was activated during patch.
             * The queue will be processed after the entire tree has been patched.
             */
            function queueActivatedComponent(vm) {
                // setting _inactive to false here so that a render function can
                // rely on checking whether it's in an inactive tree (e.g. router-view)
                vm._inactive = false;
                activatedChildren.push(vm);
            }

            function callActivatedHooks(queue) {
                for (var i = 0; i < queue.length; i++) {
                    queue[i]._inactive = true;
                    activateChildComponent(queue[i], true /* true */ );
                }
            }
            /**
             * Push a watcher into the watcher queue.
             * Jobs with duplicate IDs will be skipped unless it's
             * pushed when the queue is being flushed.
             */
            function queueWatcher(watcher) {
                var id = watcher.id;
                if (has[id] == null) {
                    has[id] = true;
                    if (!flushing) {
                        queue.push(watcher);
                    } else {
                        // if already flushing, splice the watcher based on its id
                        // if already past its id, it will be run next immediately.
                        var i = queue.length - 1;
                        while (i > index && queue[i].id > watcher.id) {
                            i--;
                        }
                        queue.splice(i + 1, 0, watcher);
                    }
                    // queue the flush
                    if (!waiting) {
                        waiting = true;
                        if (!config.async) {
                            flushSchedulerQueue();
                            return
                        }
                        nextTick(flushSchedulerQueue);
                    }
                }
            }
            /*  */
            var uid$2 = 0;
            /**
             * A watcher parses an expression, collects dependencies,
             * and fires callback when the expression value changes.
             * This is used for both the $watch() api and directives.
             */
            var Watcher = function Watcher(vm, expOrFn, cb, options, isRenderWatcher) {
                this.vm = vm;
                if (isRenderWatcher) {
                    vm._watcher = this;
                }
                vm._watchers.push(this);
                // options
                if (options) {
                    this.deep = !!options.deep;
                    this.user = !!options.user;
                    this.lazy = !!options.lazy;
                    this.sync = !!options.sync;
                    this.before = options.before;
                } else {
                    this.deep = this.user = this.lazy = this.sync = false;
                }
                this.cb = cb;
                this.id = ++uid$2; // uid for batching
                this.active = true;
                this.dirty = this.lazy; // for lazy watchers
                this.deps = [];
                this.newDeps = [];
                this.depIds = new _Set();
                this.newDepIds = new _Set();
                this.expression = expOrFn.toString();
                // parse expression for getter
                if (typeof expOrFn === 'function') {
                    this.getter = expOrFn;
                } else {
                    this.getter = parsePath(expOrFn);
                    if (!this.getter) {
                        this.getter = noop;
                        warn("Failed watching path: \"" + expOrFn + "\" " +
                            'Watcher only accepts simple dot-delimited paths. ' +
                            'For full control, use a function instead.', vm);
                    }
                }
                this.value = this.lazy ? undefined : this.get();
            };
            /**
             * Evaluate the getter, and re-collect dependencies.
             */
            Watcher.prototype.get = function get() {
                pushTarget(this);
                var value;
                var vm = this.vm;
                try {
                    value = this.getter.call(vm, vm);
                } catch (e) {
                    if (this.user) {
                        handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
                    } else {
                        throw e
                    }
                } finally {
                    // "touch" every property so they are all tracked as
                    // dependencies for deep watching
                    if (this.deep) {
                        traverse(value);
                    }
                    popTarget();
                    this.cleanupDeps();
                }
                return value
            };
            /**
             * Add a dependency to this directive.
             */
            Watcher.prototype.addDep = function addDep(dep) {
                var id = dep.id;
                if (!this.newDepIds.has(id)) {
                    this.newDepIds.add(id);
                    this.newDeps.push(dep);
                    if (!this.depIds.has(id)) {
                        dep.addSub(this);
                    }
                }
            };
            /**
             * Clean up for dependency collection.
             */
            Watcher.prototype.cleanupDeps = function cleanupDeps() {
                var i = this.deps.length;
                while (i--) {
                    var dep = this.deps[i];
                    if (!this.newDepIds.has(dep.id)) {
                        dep.removeSub(this);
                    }
                }
                var tmp = this.depIds;
                this.depIds = this.newDepIds;
                this.newDepIds = tmp;
                this.newDepIds.clear();
                tmp = this.deps;
                this.deps = this.newDeps;
                this.newDeps = tmp;
                this.newDeps.length = 0;
            };
            /**
             * Subscriber interface.
             * Will be called when a dependency changes.
             */
            Watcher.prototype.update = function update() {
                /* istanbul ignore else */
                if (this.lazy) {
                    this.dirty = true;
                } else if (this.sync) {
                    this.run();
                } else {
                    queueWatcher(this);
                }
            };
            /**
             * Scheduler job interface.
             * Will be called by the scheduler.
             */
            Watcher.prototype.run = function run() {
                if (this.active) {
                    var value = this.get();
                    if (value !== this.value ||
                        // Deep watchers and watchers on Object/Arrays should fire even
                        // when the value is the same, because the value may
                        // have mutated.
                        isObject(value) || this.deep) {
                        // set new value
                        var oldValue = this.value;
                        this.value = value;
                        if (this.user) {
                            var info = "callback for watcher \"" + (this.expression) + "\"";
                            invokeWithErrorHandling(this.cb, this.vm, [value, oldValue], this.vm, info);
                        } else {
                            this.cb.call(this.vm, value, oldValue);
                        }
                    }
                }
            };
            /**
             * Evaluate the value of the watcher.
             * This only gets called for lazy watchers.
             */
            Watcher.prototype.evaluate = function evaluate() {
                this.value = this.get();
                this.dirty = false;
            };
            /**
             * Depend on all deps collected by this watcher.
             */
            Watcher.prototype.depend = function depend() {
                var i = this.deps.length;
                while (i--) {
                    this.deps[i].depend();
                }
            };
            /**
             * Remove self from all dependencies' subscriber list.
             */
            Watcher.prototype.teardown = function teardown() {
                if (this.active) {
                    // remove self from vm's watcher list
                    // this is a somewhat expensive operation so we skip it
                    // if the vm is being destroyed.
                    if (!this.vm._isBeingDestroyed) {
                        remove(this.vm._watchers, this);
                    }
                    var i = this.deps.length;
                    while (i--) {
                        this.deps[i].removeSub(this);
                    }
                    this.active = false;
                }
            };
            /*  */
            var sharedPropertyDefinition = {
                enumerable: true,
                configurable: true,
                get: noop,
                set: noop
            };

            function proxy(target, sourceKey, key) {
                sharedPropertyDefinition.get = function proxyGetter() {
                    return this[sourceKey][key]
                };
                sharedPropertyDefinition.set = function proxySetter(val) {
                    this[sourceKey][key] = val;
                };
                Object.defineProperty(target, key, sharedPropertyDefinition);
            }

            function initState(vm) {
                vm._watchers = [];
                var opts = vm.$options;
                if (opts.props) {
                    initProps(vm, opts.props);
                }
                if (opts.methods) {
                    initMethods(vm, opts.methods);
                }
                if (opts.data) {
                    initData(vm);
                } else {
                    observe(vm._data = {}, true /* asRootData */ );
                }
                if (opts.computed) {
                    initComputed(vm, opts.computed);
                }
                if (opts.watch && opts.watch !== nativeWatch) {
                    initWatch(vm, opts.watch);
                }
            }

            function initProps(vm, propsOptions) {
                var propsData = vm.$options.propsData || {};
                var props = vm._props = {};
                // cache prop keys so that future props updates can iterate using Array
                // instead of dynamic object key enumeration.
                var keys = vm.$options._propKeys = [];
                var isRoot = !vm.$parent;
                // root instance props should be converted
                if (!isRoot) {
                    toggleObserving(false);
                }
                var loop = function(key) {
                    keys.push(key);
                    var value = validateProp(key, propsOptions, propsData, vm);
                    /* istanbul ignore else */
                    {
                        var hyphenatedKey = hyphenate(key);
                        if (isReservedAttribute(hyphenatedKey) || config.isReservedAttr(hyphenatedKey)) {
                            warn(
                                ("\"" + hyphenatedKey +
                                    "\" is a reserved attribute and cannot be used as component prop."), vm);
                        }
                        defineReactive$$1(props, key, value, function() {
                            if (!isRoot && !isUpdatingChildComponent) {
                                warn("Avoid mutating a prop directly since the value will be " +
                                    "overwritten whenever the parent component re-renders. " +
                                    "Instead, use a data or computed property based on the prop's " +
                                    "value. Prop being mutated: \"" + key + "\"", vm);
                            }
                        });
                    }
                    // static props are already proxied on the component's prototype
                    // during Vue.extend(). We only need to proxy props defined at
                    // instantiation here.
                    if (!(key in vm)) {
                        proxy(vm, "_props", key);
                    }
                };
                for (var key in propsOptions) loop(key);
                toggleObserving(true);
            }

            function initData(vm) {
                var data = vm.$options.data;
                data = vm._data = typeof data === 'function' ? getData(data, vm) : data || {};
                if (!isPlainObject(data)) {
                    data = {};
                    warn('data functions should return an object:\n' +
                        'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function', vm);
                }
                // proxy data on instance
                var keys = Object.keys(data);
                var props = vm.$options.props;
                var methods = vm.$options.methods;
                var i = keys.length;
                while (i--) {
                    var key = keys[i]; {
                        if (methods && hasOwn(methods, key)) {
                            warn(
                                ("Method \"" + key + "\" has already been defined as a data property."), vm);
                        }
                    }
                    if (props && hasOwn(props, key)) {
                        warn("The data property \"" + key + "\" is already declared as a prop. " +
                            "Use prop default value instead.", vm);
                    } else if (!isReserved(key)) {
                        proxy(vm, "_data", key);
                    }
                }
                // observe data
                observe(data, true /* asRootData */ );
            }

            function getData(data, vm) {
                // #7573 disable dep collection when invoking data getters
                pushTarget();
                try {
                    return data.call(vm, vm)
                } catch (e) {
                    handleError(e, vm, "data()");
                    return {}
                } finally {
                    popTarget();
                }
            }
            var computedWatcherOptions = {
                lazy: true
            };

            function initComputed(vm, computed) {
                // $flow-disable-line
                var watchers = vm._computedWatchers = Object.create(null);
                // computed properties are just getters during SSR
                var isSSR = isServerRendering();
                for (var key in computed) {
                    var userDef = computed[key];
                    var getter = typeof userDef === 'function' ? userDef : userDef.get;
                    if (getter == null) {
                        warn(
                            ("Getter is missing for computed property \"" + key + "\"."), vm);
                    }
                    if (!isSSR) {
                        // create internal watcher for the computed property.
                        watchers[key] = new Watcher(vm, getter || noop, noop, computedWatcherOptions);
                    }
                    // component-defined computed properties are already defined on the
                    // component prototype. We only need to define computed properties defined
                    // at instantiation here.
                    if (!(key in vm)) {
                        defineComputed(vm, key, userDef);
                    } else {
                        if (key in vm.$data) {
                            warn(("The computed property \"" + key + "\" is already defined in data."), vm);
                        } else if (vm.$options.props && key in vm.$options.props) {
                            warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
                        } else if (vm.$options.methods && key in vm.$options.methods) {
                            warn(("The computed property \"" + key + "\" is already defined as a method."), vm);
                        }
                    }
                }
            }

            function defineComputed(target, key, userDef) {
                var shouldCache = !isServerRendering();
                if (typeof userDef === 'function') {
                    sharedPropertyDefinition.get = shouldCache ? createComputedGetter(key) : createGetterInvoker(
                        userDef);
                    sharedPropertyDefinition.set = noop;
                } else {
                    sharedPropertyDefinition.get = userDef.get ? shouldCache && userDef.cache !== false ?
                        createComputedGetter(key) : createGetterInvoker(userDef.get) : noop;
                    sharedPropertyDefinition.set = userDef.set || noop;
                }
                if (sharedPropertyDefinition.set === noop) {
                    sharedPropertyDefinition.set = function() {
                        warn(
                            ("Computed property \"" + key + "\" was assigned to but it has no setter."), this
                        );
                    };
                }
                Object.defineProperty(target, key, sharedPropertyDefinition);
            }

            function createComputedGetter(key) {
                return function computedGetter() {
                    var watcher = this._computedWatchers && this._computedWatchers[key];
                    if (watcher) {
                        if (watcher.dirty) {
                            watcher.evaluate();
                        }
                        if (Dep.target) {
                            watcher.depend();
                        }
                        return watcher.value
                    }
                }
            }

            function createGetterInvoker(fn) {
                return function computedGetter() {
                    return fn.call(this, this)
                }
            }

            function initMethods(vm, methods) {
                var props = vm.$options.props;
                for (var key in methods) {
                    {
                        if (typeof methods[key] !== 'function') {
                            warn("Method \"" + key + "\" has type \"" + (typeof methods[key]) +
                                "\" in the component definition. " + "Did you reference the function correctly?",
                                vm);
                        }
                        if (props && hasOwn(props, key)) {
                            warn(
                                ("Method \"" + key + "\" has already been defined as a prop."), vm);
                        }
                        if ((key in vm) && isReserved(key)) {
                            warn("Method \"" + key + "\" conflicts with an existing Vue instance method. " +
                                "Avoid defining component methods that start with _ or $.");
                        }
                    }
                    vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm);
                }
            }

            function initWatch(vm, watch) {
                for (var key in watch) {
                    var handler = watch[key];
                    if (Array.isArray(handler)) {
                        for (var i = 0; i < handler.length; i++) {
                            createWatcher(vm, key, handler[i]);
                        }
                    } else {
                        createWatcher(vm, key, handler);
                    }
                }
            }

            function createWatcher(vm, expOrFn, handler, options) {
                if (isPlainObject(handler)) {
                    options = handler;
                    handler = handler.handler;
                }
                if (typeof handler === 'string') {
                    handler = vm[handler];
                }
                return vm.$watch(expOrFn, handler, options)
            }

            function stateMixin(Vue) {
                // flow somehow has problems with directly declared definition object
                // when using Object.defineProperty, so we have to procedurally build up
                // the object here.
                var dataDef = {};
                dataDef.get = function() {
                    return this._data
                };
                var propsDef = {};
                propsDef.get = function() {
                    return this._props
                }; {
                    dataDef.set = function() {
                        warn('Avoid replacing instance root $data. ' + 'Use nested data properties instead.',
                            this);
                    };
                    propsDef.set = function() {
                        warn("$props is readonly.", this);
                    };
                }
                Object.defineProperty(Vue.prototype, '$data', dataDef);
                Object.defineProperty(Vue.prototype, '$props', propsDef);
                Vue.prototype.$set = set;
                Vue.prototype.$delete = del;
                Vue.prototype.$watch = function(expOrFn, cb, options) {
                    var vm = this;
                    if (isPlainObject(cb)) {
                        return createWatcher(vm, expOrFn, cb, options)
                    }
                    options = options || {};
                    options.user = true;
                    var watcher = new Watcher(vm, expOrFn, cb, options);
                    if (options.immediate) {
                        var info = "callback for immediate watcher \"" + (watcher.expression) + "\"";
                        pushTarget();
                        invokeWithErrorHandling(cb, vm, [watcher.value], vm, info);
                        popTarget();
                    }
                    return function unwatchFn() {
                        watcher.teardown();
                    }
                };
            }
            /*  */
            var uid$3 = 0;

            function initMixin(Vue) {
                Vue.prototype._init = function(options) {
                    var vm = this;
                    // a uid
                    vm._uid = uid$3++;
                    var startTag, endTag;
                    /* istanbul ignore if */
                    if (config.performance && mark) {
                        startTag = "vue-perf-start:" + (vm._uid);
                        endTag = "vue-perf-end:" + (vm._uid);
                        mark(startTag);
                    }
                    // a flag to avoid this being observed
                    vm._isVue = true;
                    // merge options
                    if (options && options._isComponent) {
                        // optimize internal component instantiation
                        // since dynamic options merging is pretty slow, and none of the
                        // internal component options needs special treatment.
                        initInternalComponent(vm, options);
                    } else {
                        vm.$options = mergeOptions(resolveConstructorOptions(vm.constructor), options || {}, vm);
                    }
                    /* istanbul ignore else */
                    {
                        initProxy(vm);
                    }
                    // expose real self
                    vm._self = vm;
                    initLifecycle(vm);
                    initEvents(vm);
                    initRender(vm);
                    callHook(vm, 'beforeCreate');
                    initInjections(vm); // resolve injections before data/props
                    initState(vm);
                    initProvide(vm); // resolve provide after data/props
                    callHook(vm, 'created');
                    /* istanbul ignore if */
                    if (config.performance && mark) {
                        vm._name = formatComponentName(vm, false);
                        mark(endTag);
                        measure(("vue " + (vm._name) + " init"), startTag, endTag);
                    }
                    if (vm.$options.el) {
                        vm.$mount(vm.$options.el);
                    }
                };
            }

            function initInternalComponent(vm, options) {
                var opts = vm.$options = Object.create(vm.constructor.options);
                // doing this because it's faster than dynamic enumeration.
                var parentVnode = options._parentVnode;
                opts.parent = options.parent;
                opts._parentVnode = parentVnode;
                var vnodeComponentOptions = parentVnode.componentOptions;
                opts.propsData = vnodeComponentOptions.propsData;
                opts._parentListeners = vnodeComponentOptions.listeners;
                opts._renderChildren = vnodeComponentOptions.children;
                opts._componentTag = vnodeComponentOptions.tag;
                if (options.render) {
                    opts.render = options.render;
                    opts.staticRenderFns = options.staticRenderFns;
                }
            }

            function resolveConstructorOptions(Ctor) {
                var options = Ctor.options;
                if (Ctor.super) {
                    var superOptions = resolveConstructorOptions(Ctor.super);
                    var cachedSuperOptions = Ctor.superOptions;
                    if (superOptions !== cachedSuperOptions) {
                        // super option changed,
                        // need to resolve new options.
                        Ctor.superOptions = superOptions;
                        // check if there are any late-modified/attached options (#4976)
                        var modifiedOptions = resolveModifiedOptions(Ctor);
                        // update base extend options
                        if (modifiedOptions) {
                            extend(Ctor.extendOptions, modifiedOptions);
                        }
                        options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
                        if (options.name) {
                            options.components[options.name] = Ctor;
                        }
                    }
                }
                return options
            }

            function resolveModifiedOptions(Ctor) {
                var modified;
                var latest = Ctor.options;
                var sealed = Ctor.sealedOptions;
                for (var key in latest) {
                    if (latest[key] !== sealed[key]) {
                        if (!modified) {
                            modified = {};
                        }
                        modified[key] = latest[key];
                    }
                }
                return modified
            }

            function Vue(options) {
                if (!(this instanceof Vue)) {
                    warn('Vue is a constructor and should be called with the `new` keyword');
                }
                this._init(options);
            }
            initMixin(Vue);
            stateMixin(Vue);
            eventsMixin(Vue);
            lifecycleMixin(Vue);
            renderMixin(Vue);
            /*  */
            function initUse(Vue) {
                Vue.use = function(plugin) {
                    var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
                    if (installedPlugins.indexOf(plugin) > -1) {
                        return this
                    }
                    // additional parameters
                    var args = toArray(arguments, 1);
                    args.unshift(this);
                    if (typeof plugin.install === 'function') {
                        plugin.install.apply(plugin, args);
                    } else if (typeof plugin === 'function') {
                        plugin.apply(null, args);
                    }
                    installedPlugins.push(plugin);
                    return this
                };
            }
            /*  */
            function initMixin$1(Vue) {
                Vue.mixin = function(mixin) {
                    this.options = mergeOptions(this.options, mixin);
                    return this
                };
            }
            /*  */
            function initExtend(Vue) {
                /**
                 * Each instance constructor, including Vue, has a unique
                 * cid. This enables us to create wrapped "child
                 * constructors" for prototypal inheritance and cache them.
                 */
                Vue.cid = 0;
                var cid = 1;
                /**
                 * Class inheritance
                 */
                Vue.extend = function(extendOptions) {
                    extendOptions = extendOptions || {};
                    var Super = this;
                    var SuperId = Super.cid;
                    var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
                    if (cachedCtors[SuperId]) {
                        return cachedCtors[SuperId]
                    }
                    var name = extendOptions.name || Super.options.name;
                    if (name) {
                        validateComponentName(name);
                    }
                    var Sub = function VueComponent(options) {
                        this._init(options);
                    };
                    Sub.prototype = Object.create(Super.prototype);
                    Sub.prototype.constructor = Sub;
                    Sub.cid = cid++;
                    Sub.options = mergeOptions(Super.options, extendOptions);
                    Sub['super'] = Super;
                    // For props and computed properties, we define the proxy getters on
                    // the Vue instances at extension time, on the extended prototype. This
                    // avoids Object.defineProperty calls for each instance created.
                    if (Sub.options.props) {
                        initProps$1(Sub);
                    }
                    if (Sub.options.computed) {
                        initComputed$1(Sub);
                    }
                    // allow further extension/mixin/plugin usage
                    Sub.extend = Super.extend;
                    Sub.mixin = Super.mixin;
                    Sub.use = Super.use;
                    // create asset registers, so extended classes
                    // can have their private assets too.
                    ASSET_TYPES.forEach(function(type) {
                        Sub[type] = Super[type];
                    });
                    // enable recursive self-lookup
                    if (name) {
                        Sub.options.components[name] = Sub;
                    }
                    // keep a reference to the super options at extension time.
                    // later at instantiation we can check if Super's options have
                    // been updated.
                    Sub.superOptions = Super.options;
                    Sub.extendOptions = extendOptions;
                    Sub.sealedOptions = extend({}, Sub.options);
                    // cache constructor
                    cachedCtors[SuperId] = Sub;
                    return Sub
                };
            }

            function initProps$1(Comp) {
                var props = Comp.options.props;
                for (var key in props) {
                    proxy(Comp.prototype, "_props", key);
                }
            }

            function initComputed$1(Comp) {
                var computed = Comp.options.computed;
                for (var key in computed) {
                    defineComputed(Comp.prototype, key, computed[key]);
                }
            }
            /*  */
            function initAssetRegisters(Vue) {
                /**
                 * Create asset registration methods.
                 */
                ASSET_TYPES.forEach(function(type) {
                    Vue[type] = function(id, definition) {
                        if (!definition) {
                            return this.options[type + 's'][id]
                        } else {
                            /* istanbul ignore if */
                            if (type === 'component') {
                                validateComponentName(id);
                            }
                            if (type === 'component' && isPlainObject(definition)) {
                                definition.name = definition.name || id;
                                definition = this.options._base.extend(definition);
                            }
                            if (type === 'directive' && typeof definition === 'function') {
                                definition = {
                                    bind: definition,
                                    update: definition
                                };
                            }
                            this.options[type + 's'][id] = definition;
                            return definition
                        }
                    };
                });
            }
            /*  */
            function getComponentName(opts) {
                return opts && (opts.Ctor.options.name || opts.tag)
            }

            function matches(pattern, name) {
                if (Array.isArray(pattern)) {
                    return pattern.indexOf(name) > -1
                } else if (typeof pattern === 'string') {
                    return pattern.split(',').indexOf(name) > -1
                } else if (isRegExp(pattern)) {
                    return pattern.test(name)
                }
                /* istanbul ignore next */
                return false
            }

            function pruneCache(keepAliveInstance, filter) {
                var cache = keepAliveInstance.cache;
                var keys = keepAliveInstance.keys;
                var _vnode = keepAliveInstance._vnode;
                for (var key in cache) {
                    var entry = cache[key];
                    if (entry) {
                        var name = entry.name;
                        if (name && !filter(name)) {
                            pruneCacheEntry(cache, key, keys, _vnode);
                        }
                    }
                }
            }

            function pruneCacheEntry(cache, key, keys, current) {
                var entry = cache[key];
                if (entry && (!current || entry.tag !== current.tag)) {
                    entry.componentInstance.$destroy();
                }
                cache[key] = null;
                remove(keys, key);
            }
            var patternTypes = [String, RegExp, Array];
            var KeepAlive = {
                name: 'keep-alive',
                abstract: true,
                props: {
                    include: patternTypes,
                    exclude: patternTypes,
                    max: [String, Number]
                },
                methods: {
                    cacheVNode: function cacheVNode() {
                        var ref = this;
                        var cache = ref.cache;
                        var keys = ref.keys;
                        var vnodeToCache = ref.vnodeToCache;
                        var keyToCache = ref.keyToCache;
                        if (vnodeToCache) {
                            var tag = vnodeToCache.tag;
                            var componentInstance = vnodeToCache.componentInstance;
                            var componentOptions = vnodeToCache.componentOptions;
                            cache[keyToCache] = {
                                name: getComponentName(componentOptions),
                                tag: tag,
                                componentInstance: componentInstance,
                            };
                            keys.push(keyToCache);
                            // prune oldest entry
                            if (this.max && keys.length > parseInt(this.max)) {
                                pruneCacheEntry(cache, keys[0], keys, this._vnode);
                            }
                            this.vnodeToCache = null;
                        }
                    }
                },
                created: function created() {
                    this.cache = Object.create(null);
                    this.keys = [];
                },
                destroyed: function destroyed() {
                    for (var key in this.cache) {
                        pruneCacheEntry(this.cache, key, this.keys);
                    }
                },
                mounted: function mounted() {
                    var this$1 = this;
                    this.cacheVNode();
                    this.$watch('include', function(val) {
                        pruneCache(this$1, function(name) {
                            return matches(val, name);
                        });
                    });
                    this.$watch('exclude', function(val) {
                        pruneCache(this$1, function(name) {
                            return !matches(val, name);
                        });
                    });
                },
                updated: function updated() {
                    this.cacheVNode();
                },
                render: function render() {
                    var slot = this.$slots.default;
                    var vnode = getFirstComponentChild(slot);
                    var componentOptions = vnode && vnode.componentOptions;
                    if (componentOptions) {
                        // check pattern
                        var name = getComponentName(componentOptions);
                        var ref = this;
                        var include = ref.include;
                        var exclude = ref.exclude;
                        if (
                            // not included
                            (include && (!name || !matches(include, name))) ||
                            // excluded
                            (exclude && name && matches(exclude, name))) {
                            return vnode
                        }
                        var ref$1 = this;
                        var cache = ref$1.cache;
                        var keys = ref$1.keys;
                        var key = vnode.key == null
                            // same constructor may get registered as different local components
                            // so cid alone is not enough (#3269)
                            ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions
                            .tag)) : '') : vnode.key;
                        if (cache[key]) {
                            vnode.componentInstance = cache[key].componentInstance;
                            // make current key freshest
                            remove(keys, key);
                            keys.push(key);
                        } else {
                            // delay setting the cache until update
                            this.vnodeToCache = vnode;
                            this.keyToCache = key;
                        }
                        vnode.data.keepAlive = true;
                    }
                    return vnode || (slot && slot[0])
                }
            };
            var builtInComponents = {
                KeepAlive: KeepAlive
            };
            /*  */
            function initGlobalAPI(Vue) {
                // config
                var configDef = {};
                configDef.get = function() {
                    return config;
                }; {
                    configDef.set = function() {
                        warn('Do not replace the Vue.config object, set individual fields instead.');
                    };
                }
                Object.defineProperty(Vue, 'config', configDef);
                // exposed util methods.
                // NOTE: these are not considered part of the public API - avoid relying on
                // them unless you are aware of the risk.
                Vue.util = {
                    warn: warn,
                    extend: extend,
                    mergeOptions: mergeOptions,
                    defineReactive: defineReactive$$1
                };
                Vue.set = set;
                Vue.delete = del;
                Vue.nextTick = nextTick;
                // 2.6 explicit observable API
                Vue.observable = function(obj) {
                    observe(obj);
                    return obj
                };
                Vue.options = Object.create(null);
                ASSET_TYPES.forEach(function(type) {
                    Vue.options[type + 's'] = Object.create(null);
                });
                // this is used to identify the "base" constructor to extend all plain-object
                // components with in Weex's multi-instance scenarios.
                Vue.options._base = Vue;
                extend(Vue.options.components, builtInComponents);
                initUse(Vue);
                initMixin$1(Vue);
                initExtend(Vue);
                initAssetRegisters(Vue);
            }
            initGlobalAPI(Vue);
            Object.defineProperty(Vue.prototype, '$isServer', {
                get: isServerRendering
            });
            Object.defineProperty(Vue.prototype, '$ssrContext', {
                get: function get() {
                    /* istanbul ignore next */
                    return this.$vnode && this.$vnode.ssrContext
                }
            });
            // expose FunctionalRenderContext for ssr runtime helper installation
            Object.defineProperty(Vue, 'FunctionalRenderContext', {
                value: FunctionalRenderContext
            });
            Vue.version = '2.6.14';
            /*  */
            // these are reserved for web because they are directly compiled away
            // during template compilation
            var isReservedAttr = makeMap('style,class');
            // attributes that should be using props for binding
            var acceptValue = makeMap('input,textarea,option,select,progress');
            var mustUseProp = function(tag, type, attr) {
                return (
                    (attr === 'value' && acceptValue(tag)) && type !== 'button' || (attr === 'selected' &&
                    tag === 'option') || (attr === 'checked' && tag === 'input') || (attr === 'muted' &&
                    tag === 'video'))
            };
            var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
            var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
            var convertEnumeratedValue = function(key, value) {
                return isFalsyAttrValue(value) || value === 'false' ? 'false'
                    // allow arbitrary string value for contenteditable
                    : key === 'contenteditable' && isValidContentEditableValue(value) ? value : 'true'
            };
            var isBooleanAttr = makeMap(
                'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
                'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
                'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
                'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
                'required,reversed,scoped,seamless,selected,sortable,' + 'truespeed,typemustmatch,visible');
            var xlinkNS = 'http://www.w3.org/1999/xlink';
            var isXlink = function(name) {
                return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
            };
            var getXlinkProp = function(name) {
                return isXlink(name) ? name.slice(6, name.length) : ''
            };
            var isFalsyAttrValue = function(val) {
                return val == null || val === false
            };
            /*  */
            function genClassForVnode(vnode) {
                var data = vnode.data;
                var parentNode = vnode;
                var childNode = vnode;
                while (isDef(childNode.componentInstance)) {
                    childNode = childNode.componentInstance._vnode;
                    if (childNode && childNode.data) {
                        data = mergeClassData(childNode.data, data);
                    }
                }
                while (isDef(parentNode = parentNode.parent)) {
                    if (parentNode && parentNode.data) {
                        data = mergeClassData(data, parentNode.data);
                    }
                }
                return renderClass(data.staticClass, data.class)
            }

            function mergeClassData(child, parent) {
                return {
                    staticClass: concat(child.staticClass, parent.staticClass),
                    class: isDef(child.class) ? [child.class, parent.class] : parent.class
                }
            }

            function renderClass(staticClass, dynamicClass) {
                if (isDef(staticClass) || isDef(dynamicClass)) {
                    return concat(staticClass, stringifyClass(dynamicClass))
                }
                /* istanbul ignore next */
                return ''
            }

            function concat(a, b) {
                return a ? b ? (a + ' ' + b) : a : (b || '')
            }

            function stringifyClass(value) {
                if (Array.isArray(value)) {
                    return stringifyArray(value)
                }
                if (isObject(value)) {
                    return stringifyObject(value)
                }
                if (typeof value === 'string') {
                    return value
                }
                /* istanbul ignore next */
                return ''
            }

            function stringifyArray(value) {
                var res = '';
                var stringified;
                for (var i = 0, l = value.length; i < l; i++) {
                    if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
                        if (res) {
                            res += ' ';
                        }
                        res += stringified;
                    }
                }
                return res
            }

            function stringifyObject(value) {
                var res = '';
                for (var key in value) {
                    if (value[key]) {
                        if (res) {
                            res += ' ';
                        }
                        res += key;
                    }
                }
                return res
            }
            /*  */
            var namespaceMap = {
                svg: 'http://www.w3.org/2000/svg',
                math: 'http://www.w3.org/1998/Math/MathML'
            };
            var isHTMLTag = makeMap('html,body,base,head,link,meta,style,title,' +
                'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
                'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
                'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
                's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
                'embed,object,param,source,canvas,script,noscript,del,ins,' +
                'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
                'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
                'output,progress,select,textarea,' + 'details,dialog,menu,menuitem,summary,' +
                'content,element,shadow,template,blockquote,iframe,tfoot');
            // this map is intentionally selective, only covering SVG elements that may
            // contain child elements.
            var isSVG = makeMap('svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
                'foreignobject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
                'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view', true);
            var isPreTag = function(tag) {
                return tag === 'pre';
            };
            var isReservedTag = function(tag) {
                return isHTMLTag(tag) || isSVG(tag)
            };

            function getTagNamespace(tag) {
                if (isSVG(tag)) {
                    return 'svg'
                }
                // basic support for MathML
                // note it doesn't support other MathML elements being component roots
                if (tag === 'math') {
                    return 'math'
                }
            }
            var unknownElementCache = Object.create(null);

            function isUnknownElement(tag) {
                /* istanbul ignore if */
                if (!inBrowser) {
                    return true
                }
                if (isReservedTag(tag)) {
                    return false
                }
                tag = tag.toLowerCase();
                /* istanbul ignore if */
                if (unknownElementCache[tag] != null) {
                    return unknownElementCache[tag]
                }
                var el = document.createElement(tag);
                if (tag.indexOf('-') > -1) {
                    // http://stackoverflow.com/a/28210364/1070244
                    return (unknownElementCache[tag] = (el.constructor === window.HTMLUnknownElement || el
                        .constructor === window.HTMLElement))
                } else {
                    return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
                }
            }
            var isTextInputType = makeMap('text,number,password,search,email,tel,url');
            /*  */
            /**
             * Query an element selector if it's not an element already.
             */
            function query(el) {
                if (typeof el === 'string') {
                    var selected = document.querySelector(el);
                    if (!selected) {
                        warn('Cannot find element: ' + el);
                        return document.createElement('div')
                    }
                    return selected
                } else {
                    return el
                }
            }
            /*  */
            function createElement$1(tagName, vnode) {
                var elm = document.createElement(tagName);
                if (tagName !== 'select') {
                    return elm
                }
                // false or null will remove the attribute but undefined will not
                if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
                    elm.setAttribute('multiple', 'multiple');
                }
                return elm
            }

            function createElementNS(namespace, tagName) {
                return document.createElementNS(namespaceMap[namespace], tagName)
            }

            function createTextNode(text) {
                return document.createTextNode(text)
            }

            function createComment(text) {
                return document.createComment(text)
            }

            function insertBefore(parentNode, newNode, referenceNode) {
                parentNode.insertBefore(newNode, referenceNode);
            }

            function removeChild(node, child) {
                node.removeChild(child);
            }

            function appendChild(node, child) {
                node.appendChild(child);
            }

            function parentNode(node) {
                return node.parentNode
            }

            function nextSibling(node) {
                return node.nextSibling
            }

            function tagName(node) {
                return node.tagName
            }

            function setTextContent(node, text) {
                node.textContent = text;
            }

            function setStyleScope(node, scopeId) {
                node.setAttribute(scopeId, '');
            }
            var nodeOps = /*#__PURE__*/ Object.freeze({
                createElement: createElement$1,
                createElementNS: createElementNS,
                createTextNode: createTextNode,
                createComment: createComment,
                insertBefore: insertBefore,
                removeChild: removeChild,
                appendChild: appendChild,
                parentNode: parentNode,
                nextSibling: nextSibling,
                tagName: tagName,
                setTextContent: setTextContent,
                setStyleScope: setStyleScope
            });
            /*  */
            var ref = {
                create: function create(_, vnode) {
                    registerRef(vnode);
                },
                update: function update(oldVnode, vnode) {
                    if (oldVnode.data.ref !== vnode.data.ref) {
                        registerRef(oldVnode, true);
                        registerRef(vnode);
                    }
                },
                destroy: function destroy(vnode) {
                    registerRef(vnode, true);
                }
            };

            function registerRef(vnode, isRemoval) {
                var key = vnode.data.ref;
                if (!isDef(key)) {
                    return
                }
                var vm = vnode.context;
                var ref = vnode.componentInstance || vnode.elm;
                var refs = vm.$refs;
                if (isRemoval) {
                    if (Array.isArray(refs[key])) {
                        remove(refs[key], ref);
                    } else if (refs[key] === ref) {
                        refs[key] = undefined;
                    }
                } else {
                    if (vnode.data.refInFor) {
                        if (!Array.isArray(refs[key])) {
                            refs[key] = [ref];
                        } else if (refs[key].indexOf(ref) < 0) {
                            // $flow-disable-line
                            refs[key].push(ref);
                        }
                    } else {
                        refs[key] = ref;
                    }
                }
            }
            /**
             * Virtual DOM patching algorithm based on Snabbdom by
             * Simon Friis Vindum (@paldepind)
             * Licensed under the MIT License
             * https://github.com/paldepind/snabbdom/blob/master/LICENSE
             *
             * modified by Evan You (@yyx990803)
             *
             * Not type-checking this because this file is perf-critical and the cost
             * of making flow understand it is not worth it.
             */
            var emptyNode = new VNode('', {}, []);
            var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];

            function sameVnode(a, b) {
                return (a.key === b.key && a.asyncFactory === b.asyncFactory && (
                    (a.tag === b.tag && a.isComment === b.isComment && isDef(a.data) === isDef(b.data) &&
                        sameInputType(a, b)) || (isTrue(a.isAsyncPlaceholder) && isUndef(b.asyncFactory
                        .error))))
            }

            function sameInputType(a, b) {
                if (a.tag !== 'input') {
                    return true
                }
                var i;
                var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
                var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
                return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
            }

            function createKeyToOldIdx(children, beginIdx, endIdx) {
                var i, key;
                var map = {};
                for (i = beginIdx; i <= endIdx; ++i) {
                    key = children[i].key;
                    if (isDef(key)) {
                        map[key] = i;
                    }
                }
                return map
            }

            function createPatchFunction(backend) {
                var i, j;
                var cbs = {};
                var modules = backend.modules;
                var nodeOps = backend.nodeOps;
                for (i = 0; i < hooks.length; ++i) {
                    cbs[hooks[i]] = [];
                    for (j = 0; j < modules.length; ++j) {
                        if (isDef(modules[j][hooks[i]])) {
                            cbs[hooks[i]].push(modules[j][hooks[i]]);
                        }
                    }
                }

                function emptyNodeAt(elm) {
                    return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
                }

                function createRmCb(childElm, listeners) {
                    function remove$$1() {
                        if (--remove$$1.listeners === 0) {
                            removeNode(childElm);
                        }
                    }
                    remove$$1.listeners = listeners;
                    return remove$$1
                }

                function removeNode(el) {
                    var parent = nodeOps.parentNode(el);
                    // element may have already been removed due to v-html / v-text
                    if (isDef(parent)) {
                        nodeOps.removeChild(parent, el);
                    }
                }

                function isUnknownElement$$1(vnode, inVPre) {
                    return (!inVPre && !vnode.ns && !(config.ignoredElements.length && config.ignoredElements.some(
                        function(ignore) {
                            return isRegExp(ignore) ? ignore.test(vnode.tag) : ignore === vnode.tag
                        })) && config.isUnknownElement(vnode.tag))
                }
                var creatingElmInVPre = 0;

                function createElm(vnode, insertedVnodeQueue, parentElm, refElm, nested, ownerArray, index) {
                    if (isDef(vnode.elm) && isDef(ownerArray)) {
                        // This vnode was used in a previous render!
                        // now it's used as a new node, overwriting its elm would cause
                        // potential patch errors down the road when it's used as an insertion
                        // reference node. Instead, we clone the node on-demand before creating
                        // associated DOM element for it.
                        vnode = ownerArray[index] = cloneVNode(vnode);
                    }
                    vnode.isRootInsert = !nested; // for transition enter check
                    if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
                        return
                    }
                    var data = vnode.data;
                    var children = vnode.children;
                    var tag = vnode.tag;
                    if (isDef(tag)) {
                        {
                            if (data && data.pre) {
                                creatingElmInVPre++;
                            }
                            if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
                                warn('Unknown custom element: <' + tag + '> - did you ' +
                                    'register the component correctly? For recursive components, ' +
                                    'make sure to provide the "name" option.', vnode.context);
                            }
                        }
                        vnode.elm = vnode.ns ? nodeOps.createElementNS(vnode.ns, tag) : nodeOps.createElement(tag,
                            vnode);
                        setScope(vnode);
                        /* istanbul ignore if */
                        {
                            createChildren(vnode, children, insertedVnodeQueue);
                            if (isDef(data)) {
                                invokeCreateHooks(vnode, insertedVnodeQueue);
                            }
                            insert(parentElm, vnode.elm, refElm);
                        }
                        if (data && data.pre) {
                            creatingElmInVPre--;
                        }
                    } else if (isTrue(vnode.isComment)) {
                        vnode.elm = nodeOps.createComment(vnode.text);
                        insert(parentElm, vnode.elm, refElm);
                    } else {
                        vnode.elm = nodeOps.createTextNode(vnode.text);
                        insert(parentElm, vnode.elm, refElm);
                    }
                }

                function createComponent(vnode, insertedVnodeQueue, parentElm, refElm) {
                    var i = vnode.data;
                    if (isDef(i)) {
                        var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
                        if (isDef(i = i.hook) && isDef(i = i.init)) {
                            i(vnode, false /* hydrating */ );
                        }
                        // after calling the init hook, if the vnode is a child component
                        // it should've created a child instance and mounted it. the child
                        // component also has set the placeholder vnode's elm.
                        // in that case we can just return the element and be done.
                        if (isDef(vnode.componentInstance)) {
                            initComponent(vnode, insertedVnodeQueue);
                            insert(parentElm, vnode.elm, refElm);
                            if (isTrue(isReactivated)) {
                                reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
                            }
                            return true
                        }
                    }
                }

                function initComponent(vnode, insertedVnodeQueue) {
                    if (isDef(vnode.data.pendingInsert)) {
                        insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
                        vnode.data.pendingInsert = null;
                    }
                    vnode.elm = vnode.componentInstance.$el;
                    if (isPatchable(vnode)) {
                        invokeCreateHooks(vnode, insertedVnodeQueue);
                        setScope(vnode);
                    } else {
                        // empty component root.
                        // skip all element-related modules except for ref (#3455)
                        registerRef(vnode);
                        // make sure to invoke the insert hook
                        insertedVnodeQueue.push(vnode);
                    }
                }

                function reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm) {
                    var i;
                    // hack for #4339: a reactivated component with inner transition
                    // does not trigger because the inner node's created hooks are not called
                    // again. It's not ideal to involve module-specific logic in here but
                    // there doesn't seem to be a better way to do it.
                    var innerNode = vnode;
                    while (innerNode.componentInstance) {
                        innerNode = innerNode.componentInstance._vnode;
                        if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
                            for (i = 0; i < cbs.activate.length; ++i) {
                                cbs.activate[i](emptyNode, innerNode);
                            }
                            insertedVnodeQueue.push(innerNode);
                            break
                        }
                    }
                    // unlike a newly created component,
                    // a reactivated keep-alive component doesn't insert itself
                    insert(parentElm, vnode.elm, refElm);
                }

                function insert(parent, elm, ref$$1) {
                    if (isDef(parent)) {
                        if (isDef(ref$$1)) {
                            if (nodeOps.parentNode(ref$$1) === parent) {
                                nodeOps.insertBefore(parent, elm, ref$$1);
                            }
                        } else {
                            nodeOps.appendChild(parent, elm);
                        }
                    }
                }

                function createChildren(vnode, children, insertedVnodeQueue) {
                    if (Array.isArray(children)) {
                        {
                            checkDuplicateKeys(children);
                        }
                        for (var i = 0; i < children.length; ++i) {
                            createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i);
                        }
                    } else if (isPrimitive(vnode.text)) {
                        nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
                    }
                }

                function isPatchable(vnode) {
                    while (vnode.componentInstance) {
                        vnode = vnode.componentInstance._vnode;
                    }
                    return isDef(vnode.tag)
                }

                function invokeCreateHooks(vnode, insertedVnodeQueue) {
                    for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
                        cbs.create[i$1](emptyNode, vnode);
                    }
                    i = vnode.data.hook; // Reuse variable
                    if (isDef(i)) {
                        if (isDef(i.create)) {
                            i.create(emptyNode, vnode);
                        }
                        if (isDef(i.insert)) {
                            insertedVnodeQueue.push(vnode);
                        }
                    }
                }
                // set scope id attribute for scoped CSS.
                // this is implemented as a special case to avoid the overhead
                // of going through the normal attribute patching process.
                function setScope(vnode) {
                    var i;
                    if (isDef(i = vnode.fnScopeId)) {
                        nodeOps.setStyleScope(vnode.elm, i);
                    } else {
                        var ancestor = vnode;
                        while (ancestor) {
                            if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
                                nodeOps.setStyleScope(vnode.elm, i);
                            }
                            ancestor = ancestor.parent;
                        }
                    }
                    // for slot content they should also get the scopeId from the host instance.
                    if (isDef(i = activeInstance) && i !== vnode.context && i !== vnode.fnContext && isDef(i = i
                        .$options._scopeId)) {
                        nodeOps.setStyleScope(vnode.elm, i);
                    }
                }

                function addVnodes(parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
                    for (; startIdx <= endIdx; ++startIdx) {
                        createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx);
                    }
                }

                function invokeDestroyHook(vnode) {
                    var i, j;
                    var data = vnode.data;
                    if (isDef(data)) {
                        if (isDef(i = data.hook) && isDef(i = i.destroy)) {
                            i(vnode);
                        }
                        for (i = 0; i < cbs.destroy.length; ++i) {
                            cbs.destroy[i](vnode);
                        }
                    }
                    if (isDef(i = vnode.children)) {
                        for (j = 0; j < vnode.children.length; ++j) {
                            invokeDestroyHook(vnode.children[j]);
                        }
                    }
                }

                function removeVnodes(vnodes, startIdx, endIdx) {
                    for (; startIdx <= endIdx; ++startIdx) {
                        var ch = vnodes[startIdx];
                        if (isDef(ch)) {
                            if (isDef(ch.tag)) {
                                removeAndInvokeRemoveHook(ch);
                                invokeDestroyHook(ch);
                            } else { // Text node
                                removeNode(ch.elm);
                            }
                        }
                    }
                }

                function removeAndInvokeRemoveHook(vnode, rm) {
                    if (isDef(rm) || isDef(vnode.data)) {
                        var i;
                        var listeners = cbs.remove.length + 1;
                        if (isDef(rm)) {
                            // we have a recursively passed down rm callback
                            // increase the listeners count
                            rm.listeners += listeners;
                        } else {
                            // directly removing
                            rm = createRmCb(vnode.elm, listeners);
                        }
                        // recursively invoke hooks on child component root node
                        if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
                            removeAndInvokeRemoveHook(i, rm);
                        }
                        for (i = 0; i < cbs.remove.length; ++i) {
                            cbs.remove[i](vnode, rm);
                        }
                        if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
                            i(vnode, rm);
                        } else {
                            rm();
                        }
                    } else {
                        removeNode(vnode.elm);
                    }
                }

                function updateChildren(parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
                    var oldStartIdx = 0;
                    var newStartIdx = 0;
                    var oldEndIdx = oldCh.length - 1;
                    var oldStartVnode = oldCh[0];
                    var oldEndVnode = oldCh[oldEndIdx];
                    var newEndIdx = newCh.length - 1;
                    var newStartVnode = newCh[0];
                    var newEndVnode = newCh[newEndIdx];
                    var oldKeyToIdx, idxInOld, vnodeToMove, refElm;
                    // removeOnly is a special flag used only by <transition-group>
                    // to ensure removed elements stay in correct relative positions
                    // during leaving transitions
                    var canMove = !removeOnly; {
                        checkDuplicateKeys(newCh);
                    }
                    while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
                        if (isUndef(oldStartVnode)) {
                            oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
                        } else if (isUndef(oldEndVnode)) {
                            oldEndVnode = oldCh[--oldEndIdx];
                        } else if (sameVnode(oldStartVnode, newStartVnode)) {
                            patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
                            oldStartVnode = oldCh[++oldStartIdx];
                            newStartVnode = newCh[++newStartIdx];
                        } else if (sameVnode(oldEndVnode, newEndVnode)) {
                            patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
                            oldEndVnode = oldCh[--oldEndIdx];
                            newEndVnode = newCh[--newEndIdx];
                        } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
                            patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
                            canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(
                                oldEndVnode.elm));
                            oldStartVnode = oldCh[++oldStartIdx];
                            newEndVnode = newCh[--newEndIdx];
                        } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
                            patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
                            canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
                            oldEndVnode = oldCh[--oldEndIdx];
                            newStartVnode = newCh[++newStartIdx];
                        } else {
                            if (isUndef(oldKeyToIdx)) {
                                oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx);
                            }
                            idxInOld = isDef(newStartVnode.key) ? oldKeyToIdx[newStartVnode.key] : findIdxInOld(
                                newStartVnode, oldCh, oldStartIdx, oldEndIdx);
                            if (isUndef(idxInOld)) { // New element
                                createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false,
                                    newCh, newStartIdx);
                            } else {
                                vnodeToMove = oldCh[idxInOld];
                                if (sameVnode(vnodeToMove, newStartVnode)) {
                                    patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
                                    oldCh[idxInOld] = undefined;
                                    canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
                                } else {
                                    // same key but different element. treat as new element
                                    createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false,
                                        newCh, newStartIdx);
                                }
                            }
                            newStartVnode = newCh[++newStartIdx];
                        }
                    }
                    if (oldStartIdx > oldEndIdx) {
                        refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
                        addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
                    } else if (newStartIdx > newEndIdx) {
                        removeVnodes(oldCh, oldStartIdx, oldEndIdx);
                    }
                }

                function checkDuplicateKeys(children) {
                    var seenKeys = {};
                    for (var i = 0; i < children.length; i++) {
                        var vnode = children[i];
                        var key = vnode.key;
                        if (isDef(key)) {
                            if (seenKeys[key]) {
                                warn(
                                    ("Duplicate keys detected: '" + key + "'. This may cause an update error."),
                                    vnode.context);
                            } else {
                                seenKeys[key] = true;
                            }
                        }
                    }
                }

                function findIdxInOld(node, oldCh, start, end) {
                    for (var i = start; i < end; i++) {
                        var c = oldCh[i];
                        if (isDef(c) && sameVnode(node, c)) {
                            return i
                        }
                    }
                }

                function patchVnode(oldVnode, vnode, insertedVnodeQueue, ownerArray, index, removeOnly) {
                    if (oldVnode === vnode) {
                        return
                    }
                    if (isDef(vnode.elm) && isDef(ownerArray)) {
                        // clone reused vnode
                        vnode = ownerArray[index] = cloneVNode(vnode);
                    }
                    var elm = vnode.elm = oldVnode.elm;
                    if (isTrue(oldVnode.isAsyncPlaceholder)) {
                        if (isDef(vnode.asyncFactory.resolved)) {
                            hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
                        } else {
                            vnode.isAsyncPlaceholder = true;
                        }
                        return
                    }
                    // reuse element for static trees.
                    // note we only do this if the vnode is cloned -
                    // if the new node is not cloned it means the render functions have been
                    // reset by the hot-reload-api and we need to do a proper re-render.
                    if (isTrue(vnode.isStatic) && isTrue(oldVnode.isStatic) && vnode.key === oldVnode.key && (isTrue(
                        vnode.isCloned) || isTrue(vnode.isOnce))) {
                        vnode.componentInstance = oldVnode.componentInstance;
                        return
                    }
                    var i;
                    var data = vnode.data;
                    if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
                        i(oldVnode, vnode);
                    }
                    var oldCh = oldVnode.children;
                    var ch = vnode.children;
                    if (isDef(data) && isPatchable(vnode)) {
                        for (i = 0; i < cbs.update.length; ++i) {
                            cbs.update[i](oldVnode, vnode);
                        }
                        if (isDef(i = data.hook) && isDef(i = i.update)) {
                            i(oldVnode, vnode);
                        }
                    }
                    if (isUndef(vnode.text)) {
                        if (isDef(oldCh) && isDef(ch)) {
                            if (oldCh !== ch) {
                                updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly);
                            }
                        } else if (isDef(ch)) {
                            {
                                checkDuplicateKeys(ch);
                            }
                            if (isDef(oldVnode.text)) {
                                nodeOps.setTextContent(elm, '');
                            }
                            addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
                        } else if (isDef(oldCh)) {
                            removeVnodes(oldCh, 0, oldCh.length - 1);
                        } else if (isDef(oldVnode.text)) {
                            nodeOps.setTextContent(elm, '');
                        }
                    } else if (oldVnode.text !== vnode.text) {
                        nodeOps.setTextContent(elm, vnode.text);
                    }
                    if (isDef(data)) {
                        if (isDef(i = data.hook) && isDef(i = i.postpatch)) {
                            i(oldVnode, vnode);
                        }
                    }
                }

                function invokeInsertHook(vnode, queue, initial) {
                    // delay insert hooks for component root nodes, invoke them after the
                    // element is really inserted
                    if (isTrue(initial) && isDef(vnode.parent)) {
                        vnode.parent.data.pendingInsert = queue;
                    } else {
                        for (var i = 0; i < queue.length; ++i) {
                            queue[i].data.hook.insert(queue[i]);
                        }
                    }
                }
                var hydrationBailed = false;
                // list of modules that can skip create hook during hydration because they
                // are already rendered on the client or has no need for initialization
                // Note: style is excluded because it relies on initial clone for future
                // deep updates (#7063).
                var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key');
                // Note: this is a browser-only function so we can assume elms are DOM nodes.
                function hydrate(elm, vnode, insertedVnodeQueue, inVPre) {
                    var i;
                    var tag = vnode.tag;
                    var data = vnode.data;
                    var children = vnode.children;
                    inVPre = inVPre || (data && data.pre);
                    vnode.elm = elm;
                    if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
                        vnode.isAsyncPlaceholder = true;
                        return true
                    }
                    // assert node match
                    {
                        if (!assertNodeMatch(elm, vnode, inVPre)) {
                            return false
                        }
                    }
                    if (isDef(data)) {
                        if (isDef(i = data.hook) && isDef(i = i.init)) {
                            i(vnode, true /* hydrating */ );
                        }
                        if (isDef(i = vnode.componentInstance)) {
                            // child component. it should have hydrated its own tree.
                            initComponent(vnode, insertedVnodeQueue);
                            return true
                        }
                    }
                    if (isDef(tag)) {
                        if (isDef(children)) {
                            // empty element, allow client to pick up and populate children
                            if (!elm.hasChildNodes()) {
                                createChildren(vnode, children, insertedVnodeQueue);
                            } else {
                                // v-html and domProps: innerHTML
                                if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
                                    if (i !== elm.innerHTML) {
                                        /* istanbul ignore if */
                                        if (typeof console !== 'undefined' && !hydrationBailed) {
                                            hydrationBailed = true;
                                            console.warn('Parent: ', elm);
                                            console.warn('server innerHTML: ', i);
                                            console.warn('client innerHTML: ', elm.innerHTML);
                                        }
                                        return false
                                    }
                                } else {
                                    // iterate and compare children lists
                                    var childrenMatch = true;
                                    var childNode = elm.firstChild;
                                    for (var i$1 = 0; i$1 < children.length; i$1++) {
                                        if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue,
                                            inVPre)) {
                                            childrenMatch = false;
                                            break
                                        }
                                        childNode = childNode.nextSibling;
                                    }
                                    // if childNode is not null, it means the actual childNodes list is
                                    // longer than the virtual children list.
                                    if (!childrenMatch || childNode) {
                                        /* istanbul ignore if */
                                        if (typeof console !== 'undefined' && !hydrationBailed) {
                                            hydrationBailed = true;
                                            console.warn('Parent: ', elm);
                                            console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes,
                                                children);
                                        }
                                        return false
                                    }
                                }
                            }
                        }
                        if (isDef(data)) {
                            var fullInvoke = false;
                            for (var key in data) {
                                if (!isRenderedModule(key)) {
                                    fullInvoke = true;
                                    invokeCreateHooks(vnode, insertedVnodeQueue);
                                    break
                                }
                            }
                            if (!fullInvoke && data['class']) {
                                // ensure collecting deps for deep class bindings for future updates
                                traverse(data['class']);
                            }
                        }
                    } else if (elm.data !== vnode.text) {
                        elm.data = vnode.text;
                    }
                    return true
                }

                function assertNodeMatch(node, vnode, inVPre) {
                    if (isDef(vnode.tag)) {
                        return vnode.tag.indexOf('vue-component') === 0 || (!isUnknownElement$$1(vnode, inVPre) &&
                            vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase()))
                    } else {
                        return node.nodeType === (vnode.isComment ? 8 : 3)
                    }
                }
                return function patch(oldVnode, vnode, hydrating, removeOnly) {
                    if (isUndef(vnode)) {
                        if (isDef(oldVnode)) {
                            invokeDestroyHook(oldVnode);
                        }
                        return
                    }
                    var isInitialPatch = false;
                    var insertedVnodeQueue = [];
                    if (isUndef(oldVnode)) {
                        // empty mount (likely as component), create new root element
                        isInitialPatch = true;
                        createElm(vnode, insertedVnodeQueue);
                    } else {
                        var isRealElement = isDef(oldVnode.nodeType);
                        if (!isRealElement && sameVnode(oldVnode, vnode)) {
                            // patch existing root node
                            patchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly);
                        } else {
                            if (isRealElement) {
                                // mounting to a real element
                                // check if this is server-rendered content and if we can perform
                                // a successful hydration.
                                if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
                                    oldVnode.removeAttribute(SSR_ATTR);
                                    hydrating = true;
                                }
                                if (isTrue(hydrating)) {
                                    if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
                                        invokeInsertHook(vnode, insertedVnodeQueue, true);
                                        return oldVnode
                                    } else {
                                        warn('The client-side rendered virtual DOM tree is not matching ' +
                                            'server-rendered content. This is likely caused by incorrect ' +
                                            'HTML markup, for example nesting block-level elements inside ' +
                                            '<p>, or missing <tbody>. Bailing hydration and performing ' +
                                            'full client-side render.');
                                    }
                                }
                                // either not server-rendered, or hydration failed.
                                // create an empty node and replace it
                                oldVnode = emptyNodeAt(oldVnode);
                            }
                            // replacing existing element
                            var oldElm = oldVnode.elm;
                            var parentElm = nodeOps.parentNode(oldElm);
                            // create new node
                            createElm(vnode, insertedVnodeQueue,
                                // extremely rare edge case: do not insert if old element is in a
                                // leaving transition. Only happens when combining transition +
                                // keep-alive + HOCs. (#4590)
                                oldElm._leaveCb ? null : parentElm, nodeOps.nextSibling(oldElm));
                            // update parent placeholder node element, recursively
                            if (isDef(vnode.parent)) {
                                var ancestor = vnode.parent;
                                var patchable = isPatchable(vnode);
                                while (ancestor) {
                                    for (var i = 0; i < cbs.destroy.length; ++i) {
                                        cbs.destroy[i](ancestor);
                                    }
                                    ancestor.elm = vnode.elm;
                                    if (patchable) {
                                        for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
                                            cbs.create[i$1](emptyNode, ancestor);
                                        }
                                        // #6513
                                        // invoke insert hooks that may have been merged by create hooks.
                                        // e.g. for directives that uses the "inserted" hook.
                                        var insert = ancestor.data.hook.insert;
                                        if (insert.merged) {
                                            // start at index 1 to avoid re-invoking component mounted hook
                                            for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
                                                insert.fns[i$2]();
                                            }
                                        }
                                    } else {
                                        registerRef(ancestor);
                                    }
                                    ancestor = ancestor.parent;
                                }
                            }
                            // destroy old node
                            if (isDef(parentElm)) {
                                removeVnodes([oldVnode], 0, 0);
                            } else if (isDef(oldVnode.tag)) {
                                invokeDestroyHook(oldVnode);
                            }
                        }
                    }
                    invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
                    return vnode.elm
                }
            }
            /*  */
            var directives = {
                create: updateDirectives,
                update: updateDirectives,
                destroy: function unbindDirectives(vnode) {
                    updateDirectives(vnode, emptyNode);
                }
            };

            function updateDirectives(oldVnode, vnode) {
                if (oldVnode.data.directives || vnode.data.directives) {
                    _update(oldVnode, vnode);
                }
            }

            function _update(oldVnode, vnode) {
                var isCreate = oldVnode === emptyNode;
                var isDestroy = vnode === emptyNode;
                var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
                var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
                var dirsWithInsert = [];
                var dirsWithPostpatch = [];
                var key, oldDir, dir;
                for (key in newDirs) {
                    oldDir = oldDirs[key];
                    dir = newDirs[key];
                    if (!oldDir) {
                        // new directive, bind
                        callHook$1(dir, 'bind', vnode, oldVnode);
                        if (dir.def && dir.def.inserted) {
                            dirsWithInsert.push(dir);
                        }
                    } else {
                        // existing directive, update
                        dir.oldValue = oldDir.value;
                        dir.oldArg = oldDir.arg;
                        callHook$1(dir, 'update', vnode, oldVnode);
                        if (dir.def && dir.def.componentUpdated) {
                            dirsWithPostpatch.push(dir);
                        }
                    }
                }
                if (dirsWithInsert.length) {
                    var callInsert = function() {
                        for (var i = 0; i < dirsWithInsert.length; i++) {
                            callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
                        }
                    };
                    if (isCreate) {
                        mergeVNodeHook(vnode, 'insert', callInsert);
                    } else {
                        callInsert();
                    }
                }
                if (dirsWithPostpatch.length) {
                    mergeVNodeHook(vnode, 'postpatch', function() {
                        for (var i = 0; i < dirsWithPostpatch.length; i++) {
                            callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
                        }
                    });
                }
                if (!isCreate) {
                    for (key in oldDirs) {
                        if (!newDirs[key]) {
                            // no longer present, unbind
                            callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
                        }
                    }
                }
            }
            var emptyModifiers = Object.create(null);

            function normalizeDirectives$1(dirs, vm) {
                var res = Object.create(null);
                if (!dirs) {
                    // $flow-disable-line
                    return res
                }
                var i, dir;
                for (i = 0; i < dirs.length; i++) {
                    dir = dirs[i];
                    if (!dir.modifiers) {
                        // $flow-disable-line
                        dir.modifiers = emptyModifiers;
                    }
                    res[getRawDirName(dir)] = dir;
                    dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
                }
                // $flow-disable-line
                return res
            }

            function getRawDirName(dir) {
                return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
            }

            function callHook$1(dir, hook, vnode, oldVnode, isDestroy) {
                var fn = dir.def && dir.def[hook];
                if (fn) {
                    try {
                        fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
                    } catch (e) {
                        handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
                    }
                }
            }
            var baseModules = [
                ref,
                directives
            ];
            /*  */
            function updateAttrs(oldVnode, vnode) {
                var opts = vnode.componentOptions;
                if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
                    return
                }
                if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
                    return
                }
                var key, cur, old;
                var elm = vnode.elm;
                var oldAttrs = oldVnode.data.attrs || {};
                var attrs = vnode.data.attrs || {};
                // clone observed objects, as the user probably wants to mutate it
                if (isDef(attrs.__ob__)) {
                    attrs = vnode.data.attrs = extend({}, attrs);
                }
                for (key in attrs) {
                    cur = attrs[key];
                    old = oldAttrs[key];
                    if (old !== cur) {
                        setAttr(elm, key, cur, vnode.data.pre);
                    }
                }
                // #4391: in IE9, setting type can reset value for input[type=radio]
                // #6666: IE/Edge forces progress value down to 1 before setting a max
                /* istanbul ignore if */
                if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
                    setAttr(elm, 'value', attrs.value);
                }
                for (key in oldAttrs) {
                    if (isUndef(attrs[key])) {
                        if (isXlink(key)) {
                            elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
                        } else if (!isEnumeratedAttr(key)) {
                            elm.removeAttribute(key);
                        }
                    }
                }
            }

            function setAttr(el, key, value, isInPre) {
                if (isInPre || el.tagName.indexOf('-') > -1) {
                    baseSetAttr(el, key, value);
                } else if (isBooleanAttr(key)) {
                    // set attribute for blank value
                    // e.g. <option disabled>Select one</option>
                    if (isFalsyAttrValue(value)) {
                        el.removeAttribute(key);
                    } else {
                        // technically allowfullscreen is a boolean attribute for <iframe>,
                        // but Flash expects a value of "true" when used on <embed> tag
                        value = key === 'allowfullscreen' && el.tagName === 'EMBED' ? 'true' : key;
                        el.setAttribute(key, value);
                    }
                } else if (isEnumeratedAttr(key)) {
                    el.setAttribute(key, convertEnumeratedValue(key, value));
                } else if (isXlink(key)) {
                    if (isFalsyAttrValue(value)) {
                        el.removeAttributeNS(xlinkNS, getXlinkProp(key));
                    } else {
                        el.setAttributeNS(xlinkNS, key, value);
                    }
                } else {
                    baseSetAttr(el, key, value);
                }
            }

            function baseSetAttr(el, key, value) {
                if (isFalsyAttrValue(value)) {
                    el.removeAttribute(key);
                } else {
                    // #7138: IE10 & 11 fires input event when setting placeholder on
                    // <textarea>... block the first input event and remove the blocker
                    // immediately.
                    /* istanbul ignore if */
                    if (isIE && !isIE9 && el.tagName === 'TEXTAREA' && key === 'placeholder' && value !== '' && !el
                        .__ieph) {
                        var blocker = function(e) {
                            e.stopImmediatePropagation();
                            el.removeEventListener('input', blocker);
                        };
                        el.addEventListener('input', blocker);
                        // $flow-disable-line
                        el.__ieph = true; /* IE placeholder patched */
                    }
                    el.setAttribute(key, value);
                }
            }
            var attrs = {
                create: updateAttrs,
                update: updateAttrs
            };
            /*  */
            function updateClass(oldVnode, vnode) {
                var el = vnode.elm;
                var data = vnode.data;
                var oldData = oldVnode.data;
                if (isUndef(data.staticClass) && isUndef(data.class) && (isUndef(oldData) || (isUndef(oldData
                    .staticClass) && isUndef(oldData.class)))) {
                    return
                }
                var cls = genClassForVnode(vnode);
                // handle transition classes
                var transitionClass = el._transitionClasses;
                if (isDef(transitionClass)) {
                    cls = concat(cls, stringifyClass(transitionClass));
                }
                // set the class
                if (cls !== el._prevClass) {
                    el.setAttribute('class', cls);
                    el._prevClass = cls;
                }
            }
            var klass = {
                create: updateClass,
                update: updateClass
            };
            /*  */
            var validDivisionCharRE = /[\w).+\-_$\]]/;

            function parseFilters(exp) {
                var inSingle = false;
                var inDouble = false;
                var inTemplateString = false;
                var inRegex = false;
                var curly = 0;
                var square = 0;
                var paren = 0;
                var lastFilterIndex = 0;
                var c, prev, i, expression, filters;
                for (i = 0; i < exp.length; i++) {
                    prev = c;
                    c = exp.charCodeAt(i);
                    if (inSingle) {
                        if (c === 0x27 && prev !== 0x5C) {
                            inSingle = false;
                        }
                    } else if (inDouble) {
                        if (c === 0x22 && prev !== 0x5C) {
                            inDouble = false;
                        }
                    } else if (inTemplateString) {
                        if (c === 0x60 && prev !== 0x5C) {
                            inTemplateString = false;
                        }
                    } else if (inRegex) {
                        if (c === 0x2f && prev !== 0x5C) {
                            inRegex = false;
                        }
                    } else if (c === 0x7C && // pipe
                        exp.charCodeAt(i + 1) !== 0x7C && exp.charCodeAt(i - 1) !== 0x7C && !curly && !square && !
                            paren) {
                        if (expression === undefined) {
                            // first filter, end of expression
                            lastFilterIndex = i + 1;
                            expression = exp.slice(0, i).trim();
                        } else {
                            pushFilter();
                        }
                    } else {
                        switch (c) {
                            case 0x22:
                                inDouble = true;
                                break // "
                            case 0x27:
                                inSingle = true;
                                break // '
                            case 0x60:
                                inTemplateString = true;
                                break // `
                            case 0x28:
                                paren++;
                                break // (
                            case 0x29:
                                paren--;
                                break // )
                            case 0x5B:
                                square++;
                                break // [
                            case 0x5D:
                                square--;
                                break // ]
                            case 0x7B:
                                curly++;
                                break // {
                            case 0x7D:
                                curly--;
                                break // }
                        }
                        if (c === 0x2f) { // /
                            var j = i - 1;
                            var p = (void 0);
                            // find first non-whitespace prev char
                            for (; j >= 0; j--) {
                                p = exp.charAt(j);
                                if (p !== ' ') {
                                    break
                                }
                            }
                            if (!p || !validDivisionCharRE.test(p)) {
                                inRegex = true;
                            }
                        }
                    }
                }
                if (expression === undefined) {
                    expression = exp.slice(0, i).trim();
                } else if (lastFilterIndex !== 0) {
                    pushFilter();
                }

                function pushFilter() {
                    (filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
                    lastFilterIndex = i + 1;
                }
                if (filters) {
                    for (i = 0; i < filters.length; i++) {
                        expression = wrapFilter(expression, filters[i]);
                    }
                }
                return expression
            }

            function wrapFilter(exp, filter) {
                var i = filter.indexOf('(');
                if (i < 0) {
                    // _f: resolveFilter
                    return ("_f(\"" + filter + "\")(" + exp + ")")
                } else {
                    var name = filter.slice(0, i);
                    var args = filter.slice(i + 1);
                    return ("_f(\"" + name + "\")(" + exp + (args !== ')' ? ',' + args : args))
                }
            }
            /*  */
            /* eslint-disable no-unused-vars */
            function baseWarn(msg, range) {
                console.error(("[Vue compiler]: " + msg));
            }
            /* eslint-enable no-unused-vars */
            function pluckModuleFunction(modules, key) {
                return modules ? modules.map(function(m) {
                    return m[key];
                }).filter(function(_) {
                    return _;
                }) : []
            }

            function addProp(el, name, value, range, dynamic) {
                (el.props || (el.props = [])).push(rangeSetItem({
                    name: name,
                    value: value,
                    dynamic: dynamic
                }, range));
                el.plain = false;
            }

            function addAttr(el, name, value, range, dynamic) {
                var attrs = dynamic ? (el.dynamicAttrs || (el.dynamicAttrs = [])) : (el.attrs || (el.attrs = []));
                attrs.push(rangeSetItem({
                    name: name,
                    value: value,
                    dynamic: dynamic
                }, range));
                el.plain = false;
            }
            // add a raw attr (use this in preTransforms)
            function addRawAttr(el, name, value, range) {
                el.attrsMap[name] = value;
                el.attrsList.push(rangeSetItem({
                    name: name,
                    value: value
                }, range));
            }

            function addDirective(el, name, rawName, value, arg, isDynamicArg, modifiers, range) {
                (el.directives || (el.directives = [])).push(rangeSetItem({
                    name: name,
                    rawName: rawName,
                    value: value,
                    arg: arg,
                    isDynamicArg: isDynamicArg,
                    modifiers: modifiers
                }, range));
                el.plain = false;
            }

            function prependModifierMarker(symbol, name, dynamic) {
                return dynamic ? ("_p(" + name + ",\"" + symbol + "\")") : symbol +
                    name // mark the event as captured
            }

            function addHandler(el, name, value, modifiers, important, warn, range, dynamic) {
                modifiers = modifiers || emptyObject;
                // warn prevent and passive modifier
                /* istanbul ignore if */
                if (warn && modifiers.prevent && modifiers.passive) {
                    warn('passive and prevent can\'t be used together. ' +
                        'Passive handler can\'t prevent default event.', range);
                }
                // normalize click.right and click.middle since they don't actually fire
                // this is technically browser-specific, but at least for now browsers are
                // the only target envs that have right/middle clicks.
                if (modifiers.right) {
                    if (dynamic) {
                        name = "(" + name + ")==='click'?'contextmenu':(" + name + ")";
                    } else if (name === 'click') {
                        name = 'contextmenu';
                        delete modifiers.right;
                    }
                } else if (modifiers.middle) {
                    if (dynamic) {
                        name = "(" + name + ")==='click'?'mouseup':(" + name + ")";
                    } else if (name === 'click') {
                        name = 'mouseup';
                    }
                }
                // check capture modifier
                if (modifiers.capture) {
                    delete modifiers.capture;
                    name = prependModifierMarker('!', name, dynamic);
                }
                if (modifiers.once) {
                    delete modifiers.once;
                    name = prependModifierMarker('~', name, dynamic);
                }
                /* istanbul ignore if */
                if (modifiers.passive) {
                    delete modifiers.passive;
                    name = prependModifierMarker('&', name, dynamic);
                }
                var events;
                if (modifiers.native) {
                    delete modifiers.native;
                    events = el.nativeEvents || (el.nativeEvents = {});
                } else {
                    events = el.events || (el.events = {});
                }
                var newHandler = rangeSetItem({
                    value: value.trim(),
                    dynamic: dynamic
                }, range);
                if (modifiers !== emptyObject) {
                    newHandler.modifiers = modifiers;
                }
                var handlers = events[name];
                /* istanbul ignore if */
                if (Array.isArray(handlers)) {
                    important ? handlers.unshift(newHandler) : handlers.push(newHandler);
                } else if (handlers) {
                    events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
                } else {
                    events[name] = newHandler;
                }
                el.plain = false;
            }

            function getRawBindingAttr(el, name) {
                return el.rawAttrsMap[':' + name] || el.rawAttrsMap['v-bind:' + name] || el.rawAttrsMap[name]
            }

            function getBindingAttr(el, name, getStatic) {
                var dynamicValue = getAndRemoveAttr(el, ':' + name) || getAndRemoveAttr(el, 'v-bind:' + name);
                if (dynamicValue != null) {
                    return parseFilters(dynamicValue)
                } else if (getStatic !== false) {
                    var staticValue = getAndRemoveAttr(el, name);
                    if (staticValue != null) {
                        return JSON.stringify(staticValue)
                    }
                }
            }
            // note: this only removes the attr from the Array (attrsList) so that it
            // doesn't get processed by processAttrs.
            // By default it does NOT remove it from the map (attrsMap) because the map is
            // needed during codegen.
            function getAndRemoveAttr(el, name, removeFromMap) {
                var val;
                if ((val = el.attrsMap[name]) != null) {
                    var list = el.attrsList;
                    for (var i = 0, l = list.length; i < l; i++) {
                        if (list[i].name === name) {
                            list.splice(i, 1);
                            break
                        }
                    }
                }
                if (removeFromMap) {
                    delete el.attrsMap[name];
                }
                return val
            }

            function getAndRemoveAttrByRegex(el, name) {
                var list = el.attrsList;
                for (var i = 0, l = list.length; i < l; i++) {
                    var attr = list[i];
                    if (name.test(attr.name)) {
                        list.splice(i, 1);
                        return attr
                    }
                }
            }

            function rangeSetItem(item, range) {
                if (range) {
                    if (range.start != null) {
                        item.start = range.start;
                    }
                    if (range.end != null) {
                        item.end = range.end;
                    }
                }
                return item
            }
            /*  */
            /**
             * Cross-platform code generation for component v-model
             */
            function genComponentModel(el, value, modifiers) {
                var ref = modifiers || {};
                var number = ref.number;
                var trim = ref.trim;
                var baseValueExpression = '$$v';
                var valueExpression = baseValueExpression;
                if (trim) {
                    valueExpression = "(typeof " + baseValueExpression + " === 'string'" + "? " +
                        baseValueExpression + ".trim()" + ": " + baseValueExpression + ")";
                }
                if (number) {
                    valueExpression = "_n(" + valueExpression + ")";
                }
                var assignment = genAssignmentCode(value, valueExpression);
                el.model = {
                    value: ("(" + value + ")"),
                    expression: JSON.stringify(value),
                    callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
                };
            }
            /**
             * Cross-platform codegen helper for generating v-model value assignment code.
             */
            function genAssignmentCode(value, assignment) {
                var res = parseModel(value);
                if (res.key === null) {
                    return (value + "=" + assignment)
                } else {
                    return ("$set(" + (res.exp) + ", " + (res.key) + ", " + assignment + ")")
                }
            }
            /**
             * Parse a v-model expression into a base path and a final key segment.
             * Handles both dot-path and possible square brackets.
             *
             * Possible cases:
             *
             * - test
             * - test[key]
             * - test[test1[key]]
             * - test["a"][key]
             * - xxx.test[a[a].test1[key]]
             * - test.xxx.a["asa"][test1[key]]
             *
             */
            var len, str, chr, index$1, expressionPos, expressionEndPos;

            function parseModel(val) {
                // Fix https://github.com/vuejs/vue/pull/7730
                // allow v-model="obj.val " (trailing whitespace)
                val = val.trim();
                len = val.length;
                if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
                    index$1 = val.lastIndexOf('.');
                    if (index$1 > -1) {
                        return {
                            exp: val.slice(0, index$1),
                            key: '"' + val.slice(index$1 + 1) + '"'
                        }
                    } else {
                        return {
                            exp: val,
                            key: null
                        }
                    }
                }
                str = val;
                index$1 = expressionPos = expressionEndPos = 0;
                while (!eof()) {
                    chr = next();
                    /* istanbul ignore if */
                    if (isStringStart(chr)) {
                        parseString(chr);
                    } else if (chr === 0x5B) {
                        parseBracket(chr);
                    }
                }
                return {
                    exp: val.slice(0, expressionPos),
                    key: val.slice(expressionPos + 1, expressionEndPos)
                }
            }

            function next() {
                return str.charCodeAt(++index$1)
            }

            function eof() {
                return index$1 >= len
            }

            function isStringStart(chr) {
                return chr === 0x22 || chr === 0x27
            }

            function parseBracket(chr) {
                var inBracket = 1;
                expressionPos = index$1;
                while (!eof()) {
                    chr = next();
                    if (isStringStart(chr)) {
                        parseString(chr);
                        continue
                    }
                    if (chr === 0x5B) {
                        inBracket++;
                    }
                    if (chr === 0x5D) {
                        inBracket--;
                    }
                    if (inBracket === 0) {
                        expressionEndPos = index$1;
                        break
                    }
                }
            }

            function parseString(chr) {
                var stringQuote = chr;
                while (!eof()) {
                    chr = next();
                    if (chr === stringQuote) {
                        break
                    }
                }
            }
            /*  */
            var warn$1;
            // in some cases, the event used has to be determined at runtime
            // so we used some reserved tokens during compile.
            var RANGE_TOKEN = '__r';
            var CHECKBOX_RADIO_TOKEN = '__c';

            function model(el, dir, _warn) {
                warn$1 = _warn;
                var value = dir.value;
                var modifiers = dir.modifiers;
                var tag = el.tag;
                var type = el.attrsMap.type; {
                    // inputs with type="file" are read only and setting the input's
                    // value will throw an error.
                    if (tag === 'input' && type === 'file') {
                        warn$1("<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
                            "File inputs are read only. Use a v-on:change listener instead.", el.rawAttrsMap[
                            'v-model']);
                    }
                }
                if (el.component) {
                    genComponentModel(el, value, modifiers);
                    // component v-model doesn't need extra runtime
                    return false
                } else if (tag === 'select') {
                    genSelect(el, value, modifiers);
                } else if (tag === 'input' && type === 'checkbox') {
                    genCheckboxModel(el, value, modifiers);
                } else if (tag === 'input' && type === 'radio') {
                    genRadioModel(el, value, modifiers);
                } else if (tag === 'input' || tag === 'textarea') {
                    genDefaultModel(el, value, modifiers);
                } else if (!config.isReservedTag(tag)) {
                    genComponentModel(el, value, modifiers);
                    // component v-model doesn't need extra runtime
                    return false
                } else {
                    warn$1("<" + (el.tag) + " v-model=\"" + value + "\">: " +
                        "v-model is not supported on this element type. " +
                        'If you are working with contenteditable, it\'s recommended to ' +
                        'wrap a library dedicated for that purpose inside a custom component.', el.rawAttrsMap[
                        'v-model']);
                }
                // ensure runtime directive metadata
                return true
            }

            function genCheckboxModel(el, value, modifiers) {
                var number = modifiers && modifiers.number;
                var valueBinding = getBindingAttr(el, 'value') || 'null';
                var trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
                var falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
                addProp(el, 'checked', "Array.isArray(" + value + ")" + "?_i(" + value + "," + valueBinding +
                    ")>-1" + (trueValueBinding === 'true' ? (":(" + value + ")") : (":_q(" + value + "," +
                        trueValueBinding + ")")));
                addHandler(el, 'change', "var $$a=" + value + "," + '$$el=$event.target,' + "$$c=$$el.checked?(" +
                    trueValueBinding + "):(" + falseValueBinding + ");" + 'if(Array.isArray($$a)){' +
                    "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
                    '$$i=_i($$a,$$v);' + "if($$el.checked){$$i<0&&(" + (genAssignmentCode(value,
                        '$$a.concat([$$v])')) + ")}" + "else{$$i>-1&&(" + (genAssignmentCode(value,
                        '$$a.slice(0,$$i).concat($$a.slice($$i+1))')) + ")}" + "}else{" + (genAssignmentCode(
                        value, '$$c')) + "}", null, true);
            }

            function genRadioModel(el, value, modifiers) {
                var number = modifiers && modifiers.number;
                var valueBinding = getBindingAttr(el, 'value') || 'null';
                valueBinding = number ? ("_n(" + valueBinding + ")") : valueBinding;
                addProp(el, 'checked', ("_q(" + value + "," + valueBinding + ")"));
                addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
            }

            function genSelect(el, value, modifiers) {
                var number = modifiers && modifiers.number;
                var selectedVal = "Array.prototype.filter" +
                    ".call($event.target.options,function(o){return o.selected})" +
                    ".map(function(o){var val = \"_value\" in o ? o._value : o.value;" + "return " + (number ?
                        '_n(val)' : 'val') + "})";
                var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
                var code = "var $$selectedVal = " + selectedVal + ";";
                code = code + " " + (genAssignmentCode(value, assignment));
                addHandler(el, 'change', code, null, true);
            }

            function genDefaultModel(el, value, modifiers) {
                var type = el.attrsMap.type;
                // warn if v-bind:value conflicts with v-model
                // except for inputs with v-bind:type
                {
                    var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
                    var typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type'];
                    if (value$1 && !typeBinding) {
                        var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
                        warn$1(binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " +
                            'because the latter already expands to a value binding internally', el.rawAttrsMap[
                            binding]);
                    }
                }
                var ref = modifiers || {};
                var lazy = ref.lazy;
                var number = ref.number;
                var trim = ref.trim;
                var needCompositionGuard = !lazy && type !== 'range';
                var event = lazy ? 'change' : type === 'range' ? RANGE_TOKEN : 'input';
                var valueExpression = '$event.target.value';
                if (trim) {
                    valueExpression = "$event.target.value.trim()";
                }
                if (number) {
                    valueExpression = "_n(" + valueExpression + ")";
                }
                var code = genAssignmentCode(value, valueExpression);
                if (needCompositionGuard) {
                    code = "if($event.target.composing)return;" + code;
                }
                addProp(el, 'value', ("(" + value + ")"));
                addHandler(el, event, code, null, true);
                if (trim || number) {
                    addHandler(el, 'blur', '$forceUpdate()');
                }
            }
            /*  */
            // normalize v-model event tokens that can only be determined at runtime.
            // it's important to place the event as the first in the array because
            // the whole point is ensuring the v-model callback gets called before
            // user-attached handlers.
            function normalizeEvents(on) {
                /* istanbul ignore if */
                if (isDef(on[RANGE_TOKEN])) {
                    // IE input[type=range] only supports `change` event
                    var event = isIE ? 'change' : 'input';
                    on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
                    delete on[RANGE_TOKEN];
                }
                // This was originally intended to fix #4521 but no longer necessary
                // after 2.5. Keeping it for backwards compat with generated code from < 2.4
                /* istanbul ignore if */
                if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
                    on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
                    delete on[CHECKBOX_RADIO_TOKEN];
                }
            }
            var target$1;

            function createOnceHandler$1(event, handler, capture) {
                var _target = target$1; // save current target element in closure
                return function onceHandler() {
                    var res = handler.apply(null, arguments);
                    if (res !== null) {
                        remove$2(event, onceHandler, capture, _target);
                    }
                }
            }
            // #9446: Firefox <= 53 (in particular, ESR 52) has incorrect Event.timeStamp
            // implementation and does not fire microtasks in between event propagation, so
            // safe to exclude.
            var useMicrotaskFix = isUsingMicroTask && !(isFF && Number(isFF[1]) <= 53);

            function add$1(name, handler, capture, passive) {
                // async edge case #6566: inner click event triggers patch, event handler
                // attached to outer element during patch, and triggered again. This
                // happens because browsers fire microtask ticks between event propagation.
                // the solution is simple: we save the timestamp when a handler is attached,
                // and the handler would only fire if the event passed to it was fired
                // AFTER it was attached.
                if (useMicrotaskFix) {
                    var attachedTimestamp = currentFlushTimestamp;
                    var original = handler;
                    handler = original._wrapper = function(e) {
                        if (
                            // no bubbling, should always fire.
                        // this is just a safety net in case event.timeStamp is unreliable in
                        // certain weird environments...
                            e.target === e.currentTarget ||
                            // event is fired after handler attachment
                            e.timeStamp >= attachedTimestamp ||
                            // bail for environments that have buggy event.timeStamp implementations
                            // #9462 iOS 9 bug: event.timeStamp is 0 after history.pushState
                            // #9681 QtWebEngine event.timeStamp is negative value
                            e.timeStamp <= 0 ||
                            // #9448 bail if event is fired in another document in a multi-page
                            // electron/nw.js app, since event.timeStamp will be using a different
                            // starting reference
                            e.target.ownerDocument !== document) {
                            return original.apply(this, arguments)
                        }
                    };
                }
                target$1.addEventListener(name, handler, supportsPassive ? {
                    capture: capture,
                    passive: passive
                } : capture);
            }

            function remove$2(name, handler, capture, _target) {
                (_target || target$1).removeEventListener(name, handler._wrapper || handler, capture);
            }

            function updateDOMListeners(oldVnode, vnode) {
                if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
                    return
                }
                var on = vnode.data.on || {};
                var oldOn = oldVnode.data.on || {};
                target$1 = vnode.elm;
                normalizeEvents(on);
                updateListeners(on, oldOn, add$1, remove$2, createOnceHandler$1, vnode.context);
                target$1 = undefined;
            }
            var events = {
                create: updateDOMListeners,
                update: updateDOMListeners
            };
            /*  */
            var svgContainer;

            function updateDOMProps(oldVnode, vnode) {
                if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
                    return
                }
                var key, cur;
                var elm = vnode.elm;
                var oldProps = oldVnode.data.domProps || {};
                var props = vnode.data.domProps || {};
                // clone observed objects, as the user probably wants to mutate it
                if (isDef(props.__ob__)) {
                    props = vnode.data.domProps = extend({}, props);
                }
                for (key in oldProps) {
                    if (!(key in props)) {
                        elm[key] = '';
                    }
                }
                for (key in props) {
                    cur = props[key];
                    // ignore children if the node has textContent or innerHTML,
                    // as these will throw away existing DOM nodes and cause removal errors
                    // on subsequent patches (#3360)
                    if (key === 'textContent' || key === 'innerHTML') {
                        if (vnode.children) {
                            vnode.children.length = 0;
                        }
                        if (cur === oldProps[key]) {
                            continue
                        }
                        // #6601 work around Chrome version <= 55 bug where single textNode
                        // replaced by innerHTML/textContent retains its parentNode property
                        if (elm.childNodes.length === 1) {
                            elm.removeChild(elm.childNodes[0]);
                        }
                    }
                    if (key === 'value' && elm.tagName !== 'PROGRESS') {
                        // store value as _value as well since
                        // non-string values will be stringified
                        elm._value = cur;
                        // avoid resetting cursor position when value is the same
                        var strCur = isUndef(cur) ? '' : String(cur);
                        if (shouldUpdateValue(elm, strCur)) {
                            elm.value = strCur;
                        }
                    } else if (key === 'innerHTML' && isSVG(elm.tagName) && isUndef(elm.innerHTML)) {
                        // IE doesn't support innerHTML for SVG elements
                        svgContainer = svgContainer || document.createElement('div');
                        svgContainer.innerHTML = "<svg>" + cur + "</svg>";
                        var svg = svgContainer.firstChild;
                        while (elm.firstChild) {
                            elm.removeChild(elm.firstChild);
                        }
                        while (svg.firstChild) {
                            elm.appendChild(svg.firstChild);
                        }
                    } else if (
                        // skip the update if old and new VDOM state is the same.
                    // `value` is handled separately because the DOM value may be temporarily
                    // out of sync with VDOM state due to focus, composition and modifiers.
                    // This  #4521 by skipping the unnecessary `checked` update.
                        cur !== oldProps[key]) {
                        // some property updates can throw
                        // e.g. `value` on <progress> w/ non-finite value
                        try {
                            elm[key] = cur;
                        } catch (e) {}
                    }
                }
            }
            // check platforms/web/util/attrs.js acceptValue
            function shouldUpdateValue(elm, checkVal) {
                return (!elm.composing && (elm.tagName === 'OPTION' || isNotInFocusAndDirty(elm, checkVal) ||
                    isDirtyWithModifiers(elm, checkVal)))
            }

            function isNotInFocusAndDirty(elm, checkVal) {
                // return true when textbox (.number and .trim) loses focus and its value is
                // not equal to the updated value
                var notInFocus = true;
                // #6157
                // work around IE bug when accessing document.activeElement in an iframe
                try {
                    notInFocus = document.activeElement !== elm;
                } catch (e) {}
                return notInFocus && elm.value !== checkVal
            }

            function isDirtyWithModifiers(elm, newVal) {
                var value = elm.value;
                var modifiers = elm._vModifiers; // injected by v-model runtime
                if (isDef(modifiers)) {
                    if (modifiers.number) {
                        return toNumber(value) !== toNumber(newVal)
                    }
                    if (modifiers.trim) {
                        return value.trim() !== newVal.trim()
                    }
                }
                return value !== newVal
            }
            var domProps = {
                create: updateDOMProps,
                update: updateDOMProps
            };
            /*  */
            var parseStyleText = cached(function(cssText) {
                var res = {};
                var listDelimiter = /;(?![^(]*\))/g;
                var propertyDelimiter = /:(.+)/;
                cssText.split(listDelimiter).forEach(function(item) {
                    if (item) {
                        var tmp = item.split(propertyDelimiter);
                        tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
                    }
                });
                return res
            });
            // merge static and dynamic style data on the same vnode
            function normalizeStyleData(data) {
                var style = normalizeStyleBinding(data.style);
                // static style is pre-processed into an object during compilation
                // and is always a fresh object, so it's safe to merge into it
                return data.staticStyle ? extend(data.staticStyle, style) : style
            }
            // normalize possible array / string values into Object
            function normalizeStyleBinding(bindingStyle) {
                if (Array.isArray(bindingStyle)) {
                    return toObject(bindingStyle)
                }
                if (typeof bindingStyle === 'string') {
                    return parseStyleText(bindingStyle)
                }
                return bindingStyle
            }
            /**
             * parent component style should be after child's
             * so that parent component's style could override it
             */
            function getStyle(vnode, checkChild) {
                var res = {};
                var styleData;
                if (checkChild) {
                    var childNode = vnode;
                    while (childNode.componentInstance) {
                        childNode = childNode.componentInstance._vnode;
                        if (childNode && childNode.data && (styleData = normalizeStyleData(childNode.data))) {
                            extend(res, styleData);
                        }
                    }
                }
                if ((styleData = normalizeStyleData(vnode.data))) {
                    extend(res, styleData);
                }
                var parentNode = vnode;
                while ((parentNode = parentNode.parent)) {
                    if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
                        extend(res, styleData);
                    }
                }
                return res
            }
            /*  */
            var cssVarRE = /^--/;
            var importantRE = /\s*!important$/;
            var setProp = function(el, name, val) {
                /* istanbul ignore if */
                if (cssVarRE.test(name)) {
                    el.style.setProperty(name, val);
                } else if (importantRE.test(val)) {
                    el.style.setProperty(hyphenate(name), val.replace(importantRE, ''), 'important');
                } else {
                    var normalizedName = normalize(name);
                    if (Array.isArray(val)) {
                        // Support values array created by autoprefixer, e.g.
                        // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
                        // Set them one by one, and the browser will only set those it can recognize
                        for (var i = 0, len = val.length; i < len; i++) {
                            el.style[normalizedName] = val[i];
                        }
                    } else {
                        el.style[normalizedName] = val;
                    }
                }
            };
            var vendorNames = ['Webkit', 'Moz', 'ms'];
            var emptyStyle;
            var normalize = cached(function(prop) {
                emptyStyle = emptyStyle || document.createElement('div').style;
                prop = camelize(prop);
                if (prop !== 'filter' && (prop in emptyStyle)) {
                    return prop
                }
                var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
                for (var i = 0; i < vendorNames.length; i++) {
                    var name = vendorNames[i] + capName;
                    if (name in emptyStyle) {
                        return name
                    }
                }
            });

            function updateStyle(oldVnode, vnode) {
                var data = vnode.data;
                var oldData = oldVnode.data;
                if (isUndef(data.staticStyle) && isUndef(data.style) && isUndef(oldData.staticStyle) && isUndef(
                    oldData.style)) {
                    return
                }
                var cur, name;
                var el = vnode.elm;
                var oldStaticStyle = oldData.staticStyle;
                var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
                // if static style exists, stylebinding already merged into it when doing normalizeStyleData
                var oldStyle = oldStaticStyle || oldStyleBinding;
                var style = normalizeStyleBinding(vnode.data.style) || {};
                // store normalized style under a different key for next diff
                // make sure to clone it if it's reactive, since the user likely wants
                // to mutate it.
                vnode.data.normalizedStyle = isDef(style.__ob__) ? extend({}, style) : style;
                var newStyle = getStyle(vnode, true);
                for (name in oldStyle) {
                    if (isUndef(newStyle[name])) {
                        setProp(el, name, '');
                    }
                }
                for (name in newStyle) {
                    cur = newStyle[name];
                    if (cur !== oldStyle[name]) {
                        // ie9 setting to null has no effect, must use empty string
                        setProp(el, name, cur == null ? '' : cur);
                    }
                }
            }
            var style = {
                create: updateStyle,
                update: updateStyle
            };
            /*  */
            var whitespaceRE = /\s+/;
            /**
             * Add class with compatibility for SVG since classList is not supported on
             * SVG elements in IE
             */
            function addClass(el, cls) {
                /* istanbul ignore if */
                if (!cls || !(cls = cls.trim())) {
                    return
                }
                /* istanbul ignore else */
                if (el.classList) {
                    if (cls.indexOf(' ') > -1) {
                        cls.split(whitespaceRE).forEach(function(c) {
                            return el.classList.add(c);
                        });
                    } else {
                        el.classList.add(cls);
                    }
                } else {
                    var cur = " " + (el.getAttribute('class') || '') + " ";
                    if (cur.indexOf(' ' + cls + ' ') < 0) {
                        el.setAttribute('class', (cur + cls).trim());
                    }
                }
            }
            /**
             * Remove class with compatibility for SVG since classList is not supported on
             * SVG elements in IE
             */
            function removeClass(el, cls) {
                /* istanbul ignore if */
                if (!cls || !(cls = cls.trim())) {
                    return
                }
                /* istanbul ignore else */
                if (el.classList) {
                    if (cls.indexOf(' ') > -1) {
                        cls.split(whitespaceRE).forEach(function(c) {
                            return el.classList.remove(c);
                        });
                    } else {
                        el.classList.remove(cls);
                    }
                    if (!el.classList.length) {
                        el.removeAttribute('class');
                    }
                } else {
                    var cur = " " + (el.getAttribute('class') || '') + " ";
                    var tar = ' ' + cls + ' ';
                    while (cur.indexOf(tar) >= 0) {
                        cur = cur.replace(tar, ' ');
                    }
                    cur = cur.trim();
                    if (cur) {
                        el.setAttribute('class', cur);
                    } else {
                        el.removeAttribute('class');
                    }
                }
            }
            /*  */
            function resolveTransition(def$$1) {
                if (!def$$1) {
                    return
                }
                /* istanbul ignore else */
                if (typeof def$$1 === 'object') {
                    var res = {};
                    if (def$$1.css !== false) {
                        extend(res, autoCssTransition(def$$1.name || 'v'));
                    }
                    extend(res, def$$1);
                    return res
                } else if (typeof def$$1 === 'string') {
                    return autoCssTransition(def$$1)
                }
            }
            var autoCssTransition = cached(function(name) {
                return {
                    enterClass: (name + "-enter"),
                    enterToClass: (name + "-enter-to"),
                    enterActiveClass: (name + "-enter-active"),
                    leaveClass: (name + "-leave"),
                    leaveToClass: (name + "-leave-to"),
                    leaveActiveClass: (name + "-leave-active")
                }
            });
            var hasTransition = inBrowser && !isIE9;
            var TRANSITION = 'transition';
            var ANIMATION = 'animation';
            // Transition property/event sniffing
            var transitionProp = 'transition';
            var transitionEndEvent = 'transitionend';
            var animationProp = 'animation';
            var animationEndEvent = 'animationend';
            if (hasTransition) {
                /* istanbul ignore if */
                if (window.ontransitionend === undefined && window.onwebkittransitionend !== undefined) {
                    transitionProp = 'WebkitTransition';
                    transitionEndEvent = 'webkitTransitionEnd';
                }
                if (window.onanimationend === undefined && window.onwebkitanimationend !== undefined) {
                    animationProp = 'WebkitAnimation';
                    animationEndEvent = 'webkitAnimationEnd';
                }
            }
            // binding to window is necessary to make hot reload work in IE in strict mode
            var raf = inBrowser ? window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) :
                setTimeout : /* istanbul ignore next */ function(fn) {
                return fn();
            };

            function nextFrame(fn) {
                raf(function() {
                    raf(fn);
                });
            }

            function addTransitionClass(el, cls) {
                var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
                if (transitionClasses.indexOf(cls) < 0) {
                    transitionClasses.push(cls);
                    addClass(el, cls);
                }
            }

            function removeTransitionClass(el, cls) {
                if (el._transitionClasses) {
                    remove(el._transitionClasses, cls);
                }
                removeClass(el, cls);
            }

            function whenTransitionEnds(el, expectedType, cb) {
                var ref = getTransitionInfo(el, expectedType);
                var type = ref.type;
                var timeout = ref.timeout;
                var propCount = ref.propCount;
                if (!type) {
                    return cb()
                }
                var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
                var ended = 0;
                var end = function() {
                    el.removeEventListener(event, onEnd);
                    cb();
                };
                var onEnd = function(e) {
                    if (e.target === el) {
                        if (++ended >= propCount) {
                            end();
                        }
                    }
                };
                setTimeout(function() {
                    if (ended < propCount) {
                        end();
                    }
                }, timeout + 1);
                el.addEventListener(event, onEnd);
            }
            var transformRE = /\b(transform|all)(,|$)/;

            function getTransitionInfo(el, expectedType) {
                var styles = window.getComputedStyle(el);
                // JSDOM may return undefined for transition properties
                var transitionDelays = (styles[transitionProp + 'Delay'] || '').split(', ');
                var transitionDurations = (styles[transitionProp + 'Duration'] || '').split(', ');
                var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
                var animationDelays = (styles[animationProp + 'Delay'] || '').split(', ');
                var animationDurations = (styles[animationProp + 'Duration'] || '').split(', ');
                var animationTimeout = getTimeout(animationDelays, animationDurations);
                var type;
                var timeout = 0;
                var propCount = 0;
                /* istanbul ignore if */
                if (expectedType === TRANSITION) {
                    if (transitionTimeout > 0) {
                        type = TRANSITION;
                        timeout = transitionTimeout;
                        propCount = transitionDurations.length;
                    }
                } else if (expectedType === ANIMATION) {
                    if (animationTimeout > 0) {
                        type = ANIMATION;
                        timeout = animationTimeout;
                        propCount = animationDurations.length;
                    }
                } else {
                    timeout = Math.max(transitionTimeout, animationTimeout);
                    type = timeout > 0 ? transitionTimeout > animationTimeout ? TRANSITION : ANIMATION : null;
                    propCount = type ? type === TRANSITION ? transitionDurations.length : animationDurations.length :
                        0;
                }
                var hasTransform = type === TRANSITION && transformRE.test(styles[transitionProp + 'Property']);
                return {
                    type: type,
                    timeout: timeout,
                    propCount: propCount,
                    hasTransform: hasTransform
                }
            }

            function getTimeout(delays, durations) {
                /* istanbul ignore next */
                while (delays.length < durations.length) {
                    delays = delays.concat(delays);
                }
                return Math.max.apply(null, durations.map(function(d, i) {
                    return toMs(d) + toMs(delays[i])
                }))
            }
            // Old versions of Chromium (below 61.0.3163.100) formats floating pointer numbers
            // in a locale-dependent way, using a comma instead of a dot.
            // If comma is not replaced with a dot, the input will be rounded down (i.e. acting
            // as a floor function) causing unexpected behaviors
            function toMs(s) {
                return Number(s.slice(0, -1).replace(',', '.')) * 1000
            }
            /*  */
            function enter(vnode, toggleDisplay) {
                var el = vnode.elm;
                // call leave callback now
                if (isDef(el._leaveCb)) {
                    el._leaveCb.cancelled = true;
                    el._leaveCb();
                }
                var data = resolveTransition(vnode.data.transition);
                if (isUndef(data)) {
                    return
                }
                /* istanbul ignore if */
                if (isDef(el._enterCb) || el.nodeType !== 1) {
                    return
                }
                var css = data.css;
                var type = data.type;
                var enterClass = data.enterClass;
                var enterToClass = data.enterToClass;
                var enterActiveClass = data.enterActiveClass;
                var appearClass = data.appearClass;
                var appearToClass = data.appearToClass;
                var appearActiveClass = data.appearActiveClass;
                var beforeEnter = data.beforeEnter;
                var enter = data.enter;
                var afterEnter = data.afterEnter;
                var enterCancelled = data.enterCancelled;
                var beforeAppear = data.beforeAppear;
                var appear = data.appear;
                var afterAppear = data.afterAppear;
                var appearCancelled = data.appearCancelled;
                var duration = data.duration;
                // activeInstance will always be the <transition> component managing this
                // transition. One edge case to check is when the <transition> is placed
                // as the root node of a child component. In that case we need to check
                // <transition>'s parent for appear check.
                var context = activeInstance;
                var transitionNode = activeInstance.$vnode;
                while (transitionNode && transitionNode.parent) {
                    context = transitionNode.context;
                    transitionNode = transitionNode.parent;
                }
                var isAppear = !context._isMounted || !vnode.isRootInsert;
                if (isAppear && !appear && appear !== '') {
                    return
                }
                var startClass = isAppear && appearClass ? appearClass : enterClass;
                var activeClass = isAppear && appearActiveClass ? appearActiveClass : enterActiveClass;
                var toClass = isAppear && appearToClass ? appearToClass : enterToClass;
                var beforeEnterHook = isAppear ? (beforeAppear || beforeEnter) : beforeEnter;
                var enterHook = isAppear ? (typeof appear === 'function' ? appear : enter) : enter;
                var afterEnterHook = isAppear ? (afterAppear || afterEnter) : afterEnter;
                var enterCancelledHook = isAppear ? (appearCancelled || enterCancelled) : enterCancelled;
                var explicitEnterDuration = toNumber(isObject(duration) ? duration.enter : duration);
                if (explicitEnterDuration != null) {
                    checkDuration(explicitEnterDuration, 'enter', vnode);
                }
                var expectsCSS = css !== false && !isIE9;
                var userWantsControl = getHookArgumentsLength(enterHook);
                var cb = el._enterCb = once(function() {
                    if (expectsCSS) {
                        removeTransitionClass(el, toClass);
                        removeTransitionClass(el, activeClass);
                    }
                    if (cb.cancelled) {
                        if (expectsCSS) {
                            removeTransitionClass(el, startClass);
                        }
                        enterCancelledHook && enterCancelledHook(el);
                    } else {
                        afterEnterHook && afterEnterHook(el);
                    }
                    el._enterCb = null;
                });
                if (!vnode.data.show) {
                    // remove pending leave element on enter by injecting an insert hook
                    mergeVNodeHook(vnode, 'insert', function() {
                        var parent = el.parentNode;
                        var pendingNode = parent && parent._pending && parent._pending[vnode.key];
                        if (pendingNode && pendingNode.tag === vnode.tag && pendingNode.elm._leaveCb) {
                            pendingNode.elm._leaveCb();
                        }
                        enterHook && enterHook(el, cb);
                    });
                }
                // start enter transition
                beforeEnterHook && beforeEnterHook(el);
                if (expectsCSS) {
                    addTransitionClass(el, startClass);
                    addTransitionClass(el, activeClass);
                    nextFrame(function() {
                        removeTransitionClass(el, startClass);
                        if (!cb.cancelled) {
                            addTransitionClass(el, toClass);
                            if (!userWantsControl) {
                                if (isValidDuration(explicitEnterDuration)) {
                                    setTimeout(cb, explicitEnterDuration);
                                } else {
                                    whenTransitionEnds(el, type, cb);
                                }
                            }
                        }
                    });
                }
                if (vnode.data.show) {
                    toggleDisplay && toggleDisplay();
                    enterHook && enterHook(el, cb);
                }
                if (!expectsCSS && !userWantsControl) {
                    cb();
                }
            }

            function leave(vnode, rm) {
                var el = vnode.elm;
                // call enter callback now
                if (isDef(el._enterCb)) {
                    el._enterCb.cancelled = true;
                    el._enterCb();
                }
                var data = resolveTransition(vnode.data.transition);
                if (isUndef(data) || el.nodeType !== 1) {
                    return rm()
                }
                /* istanbul ignore if */
                if (isDef(el._leaveCb)) {
                    return
                }
                var css = data.css;
                var type = data.type;
                var leaveClass = data.leaveClass;
                var leaveToClass = data.leaveToClass;
                var leaveActiveClass = data.leaveActiveClass;
                var beforeLeave = data.beforeLeave;
                var leave = data.leave;
                var afterLeave = data.afterLeave;
                var leaveCancelled = data.leaveCancelled;
                var delayLeave = data.delayLeave;
                var duration = data.duration;
                var expectsCSS = css !== false && !isIE9;
                var userWantsControl = getHookArgumentsLength(leave);
                var explicitLeaveDuration = toNumber(isObject(duration) ? duration.leave : duration);
                if (isDef(explicitLeaveDuration)) {
                    checkDuration(explicitLeaveDuration, 'leave', vnode);
                }
                var cb = el._leaveCb = once(function() {
                    if (el.parentNode && el.parentNode._pending) {
                        el.parentNode._pending[vnode.key] = null;
                    }
                    if (expectsCSS) {
                        removeTransitionClass(el, leaveToClass);
                        removeTransitionClass(el, leaveActiveClass);
                    }
                    if (cb.cancelled) {
                        if (expectsCSS) {
                            removeTransitionClass(el, leaveClass);
                        }
                        leaveCancelled && leaveCancelled(el);
                    } else {
                        rm();
                        afterLeave && afterLeave(el);
                    }
                    el._leaveCb = null;
                });
                if (delayLeave) {
                    delayLeave(performLeave);
                } else {
                    performLeave();
                }

                function performLeave() {
                    // the delayed leave may have already been cancelled
                    if (cb.cancelled) {
                        return
                    }
                    // record leaving element
                    if (!vnode.data.show && el.parentNode) {
                        (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
                    }
                    beforeLeave && beforeLeave(el);
                    if (expectsCSS) {
                        addTransitionClass(el, leaveClass);
                        addTransitionClass(el, leaveActiveClass);
                        nextFrame(function() {
                            removeTransitionClass(el, leaveClass);
                            if (!cb.cancelled) {
                                addTransitionClass(el, leaveToClass);
                                if (!userWantsControl) {
                                    if (isValidDuration(explicitLeaveDuration)) {
                                        setTimeout(cb, explicitLeaveDuration);
                                    } else {
                                        whenTransitionEnds(el, type, cb);
                                    }
                                }
                            }
                        });
                    }
                    leave && leave(el, cb);
                    if (!expectsCSS && !userWantsControl) {
                        cb();
                    }
                }
            }
            // only used in dev mode
            function checkDuration(val, name, vnode) {
                if (typeof val !== 'number') {
                    warn("<transition> explicit " + name + " duration is not a valid number - " + "got " + (JSON
                        .stringify(val)) + ".", vnode.context);
                } else if (isNaN(val)) {
                    warn("<transition> explicit " + name + " duration is NaN - " +
                        'the duration expression might be incorrect.', vnode.context);
                }
            }

            function isValidDuration(val) {
                return typeof val === 'number' && !isNaN(val)
            }
            /**
             * Normalize a transition hook's argument length. The hook may be:
             * - a merged hook (invoker) with the original in .fns
             * - a wrapped component method (check ._length)
             * - a plain function (.length)
             */
            function getHookArgumentsLength(fn) {
                if (isUndef(fn)) {
                    return false
                }
                var invokerFns = fn.fns;
                if (isDef(invokerFns)) {
                    // invoker
                    return getHookArgumentsLength(Array.isArray(invokerFns) ? invokerFns[0] : invokerFns)
                } else {
                    return (fn._length || fn.length) > 1
                }
            }

            function _enter(_, vnode) {
                if (vnode.data.show !== true) {
                    enter(vnode);
                }
            }
            var transition = inBrowser ? {
                create: _enter,
                activate: _enter,
                remove: function remove$$1(vnode, rm) {
                    /* istanbul ignore else */
                    if (vnode.data.show !== true) {
                        leave(vnode, rm);
                    } else {
                        rm();
                    }
                }
            } : {};
            var platformModules = [
                attrs,
                klass,
                events,
                domProps,
                style,
                transition
            ];
            /*  */
            // the directive module should be applied last, after all
            // built-in modules have been applied.
            var modules = platformModules.concat(baseModules);
            var patch = createPatchFunction({
                nodeOps: nodeOps,
                modules: modules
            });
            /**
             * Not type checking this file because flow doesn't like attaching
             * properties to Elements.
             */
            /* istanbul ignore if */
            if (isIE9) {
                // http://www.matts411.com/post/internet-explorer-9-oninput/
                document.addEventListener('selectionchange', function() {
                    var el = document.activeElement;
                    if (el && el.vmodel) {
                        trigger(el, 'input');
                    }
                });
            }
            var directive = {
                inserted: function inserted(el, binding, vnode, oldVnode) {
                    if (vnode.tag === 'select') {
                        // #6903
                        if (oldVnode.elm && !oldVnode.elm._vOptions) {
                            mergeVNodeHook(vnode, 'postpatch', function() {
                                directive.componentUpdated(el, binding, vnode);
                            });
                        } else {
                            setSelected(el, binding, vnode.context);
                        }
                        el._vOptions = [].map.call(el.options, getValue);
                    } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
                        el._vModifiers = binding.modifiers;
                        if (!binding.modifiers.lazy) {
                            el.addEventListener('compositionstart', onCompositionStart);
                            el.addEventListener('compositionend', onCompositionEnd);
                            // Safari < 10.2 & UIWebView doesn't fire compositionend when
                            // switching focus before confirming composition choice
                            // this also fixes the issue where some browsers e.g. iOS Chrome
                            // fires "change" instead of "input" on autocomplete.
                            el.addEventListener('change', onCompositionEnd);
                            /* istanbul ignore if */
                            if (isIE9) {
                                el.vmodel = true;
                            }
                        }
                    }
                },
                componentUpdated: function componentUpdated(el, binding, vnode) {
                    if (vnode.tag === 'select') {
                        setSelected(el, binding, vnode.context);
                        // in case the options rendered by v-for have changed,
                        // it's possible that the value is out-of-sync with the rendered options.
                        // detect such cases and filter out values that no longer has a matching
                        // option in the DOM.
                        var prevOptions = el._vOptions;
                        var curOptions = el._vOptions = [].map.call(el.options, getValue);
                        if (curOptions.some(function(o, i) {
                            return !looseEqual(o, prevOptions[i]);
                        })) {
                            // trigger change event if
                            // no matching option found for at least one value
                            var needReset = el.multiple ? binding.value.some(function(v) {
                                return hasNoMatchingOption(v, curOptions);
                            }) : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value,
                                curOptions);
                            if (needReset) {
                                trigger(el, 'change');
                            }
                        }
                    }
                }
            };

            function setSelected(el, binding, vm) {
                actuallySetSelected(el, binding, vm);
                /* istanbul ignore if */
                if (isIE || isEdge) {
                    setTimeout(function() {
                        actuallySetSelected(el, binding, vm);
                    }, 0);
                }
            }

            function actuallySetSelected(el, binding, vm) {
                var value = binding.value;
                var isMultiple = el.multiple;
                if (isMultiple && !Array.isArray(value)) {
                    warn("<select multiple v-model=\"" + (binding.expression) + "\"> " +
                        "expects an Array value for its binding, but got " + (Object.prototype.toString.call(
                            value).slice(8, -1)), vm);
                    return
                }
                var selected, option;
                for (var i = 0, l = el.options.length; i < l; i++) {
                    option = el.options[i];
                    if (isMultiple) {
                        selected = looseIndexOf(value, getValue(option)) > -1;
                        if (option.selected !== selected) {
                            option.selected = selected;
                        }
                    } else {
                        if (looseEqual(getValue(option), value)) {
                            if (el.selectedIndex !== i) {
                                el.selectedIndex = i;
                            }
                            return
                        }
                    }
                }
                if (!isMultiple) {
                    el.selectedIndex = -1;
                }
            }

            function hasNoMatchingOption(value, options) {
                return options.every(function(o) {
                    return !looseEqual(o, value);
                })
            }

            function getValue(option) {
                return '_value' in option ? option._value : option.value
            }

            function onCompositionStart(e) {
                e.target.composing = true;
            }

            function onCompositionEnd(e) {
                // prevent triggering an input event for no reason
                if (!e.target.composing) {
                    return
                }
                e.target.composing = false;
                trigger(e.target, 'input');
            }

            function trigger(el, type) {
                var e = document.createEvent('HTMLEvents');
                e.initEvent(type, true, true);
                el.dispatchEvent(e);
            }
            /*  */
            // recursively search for possible transition defined inside the component root
            function locateNode(vnode) {
                return vnode.componentInstance && (!vnode.data || !vnode.data.transition) ? locateNode(vnode
                    .componentInstance._vnode) : vnode
            }
            var show = {
                bind: function bind(el, ref, vnode) {
                    var value = ref.value;
                    vnode = locateNode(vnode);
                    var transition$$1 = vnode.data && vnode.data.transition;
                    var originalDisplay = el.__vOriginalDisplay = el.style.display === 'none' ? '' : el.style
                        .display;
                    if (value && transition$$1) {
                        vnode.data.show = true;
                        enter(vnode, function() {
                            el.style.display = originalDisplay;
                        });
                    } else {
                        el.style.display = value ? originalDisplay : 'none';
                    }
                },
                update: function update(el, ref, vnode) {
                    var value = ref.value;
                    var oldValue = ref.oldValue;
                    /* istanbul ignore if */
                    if (!value === !oldValue) {
                        return
                    }
                    vnode = locateNode(vnode);
                    var transition$$1 = vnode.data && vnode.data.transition;
                    if (transition$$1) {
                        vnode.data.show = true;
                        if (value) {
                            enter(vnode, function() {
                                el.style.display = el.__vOriginalDisplay;
                            });
                        } else {
                            leave(vnode, function() {
                                el.style.display = 'none';
                            });
                        }
                    } else {
                        el.style.display = value ? el.__vOriginalDisplay : 'none';
                    }
                },
                unbind: function unbind(el, binding, vnode, oldVnode, isDestroy) {
                    if (!isDestroy) {
                        el.style.display = el.__vOriginalDisplay;
                    }
                }
            };
            var platformDirectives = {
                model: directive,
                show: show
            };
            /*  */
            var transitionProps = {
                name: String,
                appear: Boolean,
                css: Boolean,
                mode: String,
                type: String,
                enterClass: String,
                leaveClass: String,
                enterToClass: String,
                leaveToClass: String,
                enterActiveClass: String,
                leaveActiveClass: String,
                appearClass: String,
                appearActiveClass: String,
                appearToClass: String,
                duration: [Number, String, Object]
            };
            // in case the child is also an abstract component, e.g. <keep-alive>
            // we want to recursively retrieve the real component to be rendered
            function getRealChild(vnode) {
                var compOptions = vnode && vnode.componentOptions;
                if (compOptions && compOptions.Ctor.options.abstract) {
                    return getRealChild(getFirstComponentChild(compOptions.children))
                } else {
                    return vnode
                }
            }

            function extractTransitionData(comp) {
                var data = {};
                var options = comp.$options;
                // props
                for (var key in options.propsData) {
                    data[key] = comp[key];
                }
                // events.
                // extract listeners and pass them directly to the transition methods
                var listeners = options._parentListeners;
                for (var key$1 in listeners) {
                    data[camelize(key$1)] = listeners[key$1];
                }
                return data
            }

            function placeholder(h, rawChild) {
                if (/\d-keep-alive$/.test(rawChild.tag)) {
                    return h('keep-alive', {
                        props: rawChild.componentOptions.propsData
                    })
                }
            }

            function hasParentTransition(vnode) {
                while ((vnode = vnode.parent)) {
                    if (vnode.data.transition) {
                        return true
                    }
                }
            }

            function isSameChild(child, oldChild) {
                return oldChild.key === child.key && oldChild.tag === child.tag
            }
            var isNotTextNode = function(c) {
                return c.tag || isAsyncPlaceholder(c);
            };
            var isVShowDirective = function(d) {
                return d.name === 'show';
            };
            var Transition = {
                name: 'transition',
                props: transitionProps,
                abstract: true,
                render: function render(h) {
                    var this$1 = this;
                    var children = this.$slots.default;
                    if (!children) {
                        return
                    }
                    // filter out text nodes (possible whitespaces)
                    children = children.filter(isNotTextNode);
                    /* istanbul ignore if */
                    if (!children.length) {
                        return
                    }
                    // warn multiple elements
                    if (children.length > 1) {
                        warn('<transition> can only be used on a single element. Use ' +
                            '<transition-group> for lists.', this.$parent);
                    }
                    var mode = this.mode;
                    // warn invalid mode
                    if (mode && mode !== 'in-out' && mode !== 'out-in') {
                        warn('invalid <transition> mode: ' + mode, this.$parent);
                    }
                    var rawChild = children[0];
                    // if this is a component root node and the component's
                    // parent container node also has transition, skip.
                    if (hasParentTransition(this.$vnode)) {
                        return rawChild
                    }
                    // apply transition data to child
                    // use getRealChild() to ignore abstract components e.g. keep-alive
                    var child = getRealChild(rawChild);
                    /* istanbul ignore if */
                    if (!child) {
                        return rawChild
                    }
                    if (this._leaving) {
                        return placeholder(h, rawChild)
                    }
                    // ensure a key that is unique to the vnode type and to this transition
                    // component instance. This key will be used to remove pending leaving nodes
                    // during entering.
                    var id = "__transition-" + (this._uid) + "-";
                    child.key = child.key == null ? child.isComment ? id + 'comment' : id + child.tag :
                        isPrimitive(child.key) ? (String(child.key).indexOf(id) === 0 ? child.key : id +
                            child.key) : child.key;
                    var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
                    var oldRawChild = this._vnode;
                    var oldChild = getRealChild(oldRawChild);
                    // mark v-show
                    // so that the transition module can hand over the control to the directive
                    if (child.data.directives && child.data.directives.some(isVShowDirective)) {
                        child.data.show = true;
                    }
                    if (oldChild && oldChild.data && !isSameChild(child, oldChild) && !isAsyncPlaceholder(
                        oldChild) &&
                        // #6687 component root is a comment node
                        !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)) {
                        // replace old child transition data with fresh one
                        // important for dynamic transitions!
                        var oldData = oldChild.data.transition = extend({}, data);
                        // handle transition mode
                        if (mode === 'out-in') {
                            // return placeholder node and queue update when leave finishes
                            this._leaving = true;
                            mergeVNodeHook(oldData, 'afterLeave', function() {
                                this$1._leaving = false;
                                this$1.$forceUpdate();
                            });
                            return placeholder(h, rawChild)
                        } else if (mode === 'in-out') {
                            if (isAsyncPlaceholder(child)) {
                                return oldRawChild
                            }
                            var delayedLeave;
                            var performLeave = function() {
                                delayedLeave();
                            };
                            mergeVNodeHook(data, 'afterEnter', performLeave);
                            mergeVNodeHook(data, 'enterCancelled', performLeave);
                            mergeVNodeHook(oldData, 'delayLeave', function(leave) {
                                delayedLeave = leave;
                            });
                        }
                    }
                    return rawChild
                }
            };
            /*  */
            var props = extend({
                tag: String,
                moveClass: String
            }, transitionProps);
            delete props.mode;
            var TransitionGroup = {
                props: props,
                beforeMount: function beforeMount() {
                    var this$1 = this;
                    var update = this._update;
                    this._update = function(vnode, hydrating) {
                        var restoreActiveInstance = setActiveInstance(this$1);
                        // force removing pass
                        this$1.__patch__(this$1._vnode, this$1.kept, false, // hydrating
                            true // removeOnly (!important, avoids unnecessary moves)
                        );
                        this$1._vnode = this$1.kept;
                        restoreActiveInstance();
                        update.call(this$1, vnode, hydrating);
                    };
                },
                render: function render(h) {
                    var tag = this.tag || this.$vnode.data.tag || 'span';
                    var map = Object.create(null);
                    var prevChildren = this.prevChildren = this.children;
                    var rawChildren = this.$slots.default || [];
                    var children = this.children = [];
                    var transitionData = extractTransitionData(this);
                    for (var i = 0; i < rawChildren.length; i++) {
                        var c = rawChildren[i];
                        if (c.tag) {
                            if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
                                children.push(c);
                                map[c.key] = c;
                                (c.data || (c.data = {})).transition = transitionData;
                            } else {
                                var opts = c.componentOptions;
                                var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
                                warn(("<transition-group> children must be keyed: <" + name + ">"));
                            }
                        }
                    }
                    if (prevChildren) {
                        var kept = [];
                        var removed = [];
                        for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
                            var c$1 = prevChildren[i$1];
                            c$1.data.transition = transitionData;
                            c$1.data.pos = c$1.elm.getBoundingClientRect();
                            if (map[c$1.key]) {
                                kept.push(c$1);
                            } else {
                                removed.push(c$1);
                            }
                        }
                        this.kept = h(tag, null, kept);
                        this.removed = removed;
                    }
                    return h(tag, null, children)
                },
                updated: function updated() {
                    var children = this.prevChildren;
                    var moveClass = this.moveClass || ((this.name || 'v') + '-move');
                    if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
                        return
                    }
                    // we divide the work into three loops to avoid mixing DOM reads and writes
                    // in each iteration - which helps prevent layout thrashing.
                    children.forEach(callPendingCbs);
                    children.forEach(recordPosition);
                    children.forEach(applyTranslation);
                    // force reflow to put everything in position
                    // assign to this to avoid being removed in tree-shaking
                    // $flow-disable-line
                    this._reflow = document.body.offsetHeight;
                    children.forEach(function(c) {
                        if (c.data.moved) {
                            var el = c.elm;
                            var s = el.style;
                            addTransitionClass(el, moveClass);
                            s.transform = s.WebkitTransform = s.transitionDuration = '';
                            el.addEventListener(transitionEndEvent, el._moveCb = function cb(e) {
                                if (e && e.target !== el) {
                                    return
                                }
                                if (!e || /transform$/.test(e.propertyName)) {
                                    el.removeEventListener(transitionEndEvent, cb);
                                    el._moveCb = null;
                                    removeTransitionClass(el, moveClass);
                                }
                            });
                        }
                    });
                },
                methods: {
                    hasMove: function hasMove(el, moveClass) {
                        /* istanbul ignore if */
                        if (!hasTransition) {
                            return false
                        }
                        /* istanbul ignore if */
                        if (this._hasMove) {
                            return this._hasMove
                        }
                        // Detect whether an element with the move class applied has
                        // CSS transitions. Since the element may be inside an entering
                        // transition at this very moment, we make a clone of it and remove
                        // all other transition classes applied to ensure only the move class
                        // is applied.
                        var clone = el.cloneNode();
                        if (el._transitionClasses) {
                            el._transitionClasses.forEach(function(cls) {
                                removeClass(clone, cls);
                            });
                        }
                        addClass(clone, moveClass);
                        clone.style.display = 'none';
                        this.$el.appendChild(clone);
                        var info = getTransitionInfo(clone);
                        this.$el.removeChild(clone);
                        return (this._hasMove = info.hasTransform)
                    }
                }
            };

            function callPendingCbs(c) {
                /* istanbul ignore if */
                if (c.elm._moveCb) {
                    c.elm._moveCb();
                }
                /* istanbul ignore if */
                if (c.elm._enterCb) {
                    c.elm._enterCb();
                }
            }

            function recordPosition(c) {
                c.data.newPos = c.elm.getBoundingClientRect();
            }

            function applyTranslation(c) {
                var oldPos = c.data.pos;
                var newPos = c.data.newPos;
                var dx = oldPos.left - newPos.left;
                var dy = oldPos.top - newPos.top;
                if (dx || dy) {
                    c.data.moved = true;
                    var s = c.elm.style;
                    s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
                    s.transitionDuration = '0s';
                }
            }
            var platformComponents = {
                Transition: Transition,
                TransitionGroup: TransitionGroup
            };
            /*  */
            // install platform specific utils
            Vue.config.mustUseProp = mustUseProp;
            Vue.config.isReservedTag = isReservedTag;
            Vue.config.isReservedAttr = isReservedAttr;
            Vue.config.getTagNamespace = getTagNamespace;
            Vue.config.isUnknownElement = isUnknownElement;
            // install platform runtime directives & components
            extend(Vue.options.directives, platformDirectives);
            extend(Vue.options.components, platformComponents);
            // install platform patch function
            Vue.prototype.__patch__ = inBrowser ? patch : noop;
            // public mount method
            Vue.prototype.$mount = function(el, hydrating) {
                el = el && inBrowser ? query(el) : undefined;
                return mountComponent(this, el, hydrating)
            };
            // devtools global hook
            /* istanbul ignore next */
            if (inBrowser) {
                setTimeout(function() {
                    if (config.devtools) {
                        if (devtools) {
                            devtools.emit('init', Vue);
                        } else {
                            console[console.info ? 'info' : 'log'](
                                'Download the Vue Devtools extension for a better development experience:\n' +
                                'https://github.com/vuejs/vue-devtools');
                        }
                    }
                    if (config.productionTip !== false && typeof console !== 'undefined') {
                        console[console.info ? 'info' : 'log']("You are running Vue in development mode.\n" +
                            "Make sure to turn on production mode when deploying for production.\n" +
                            "See more tips at https://vuejs.org/guide/deployment.html");
                    }
                }, 0);
            }
            /*  */
            var defaultTagRE = /\{\{((?:.|\r?\n)+?)\}\}/g;
            var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
            var buildRegex = cached(function(delimiters) {
                var open = delimiters[0].replace(regexEscapeRE, '\\$&');
                var close = delimiters[1].replace(regexEscapeRE, '\\$&');
                return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
            });

            function parseText(text, delimiters) {
                var tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;
                if (!tagRE.test(text)) {
                    return
                }
                var tokens = [];
                var rawTokens = [];
                var lastIndex = tagRE.lastIndex = 0;
                var match, index, tokenValue;
                while ((match = tagRE.exec(text))) {
                    index = match.index;
                    // push text token
                    if (index > lastIndex) {
                        rawTokens.push(tokenValue = text.slice(lastIndex, index));
                        tokens.push(JSON.stringify(tokenValue));
                    }
                    // tag token
                    var exp = parseFilters(match[1].trim());
                    tokens.push(("_s(" + exp + ")"));
                    rawTokens.push({
                        '@binding': exp
                    });
                    lastIndex = index + match[0].length;
                }
                if (lastIndex < text.length) {
                    rawTokens.push(tokenValue = text.slice(lastIndex));
                    tokens.push(JSON.stringify(tokenValue));
                }
                return {
                    expression: tokens.join('+'),
                    tokens: rawTokens
                }
            }
            /*  */
            function transformNode(el, options) {
                var warn = options.warn || baseWarn;
                var staticClass = getAndRemoveAttr(el, 'class');
                if (staticClass) {
                    var res = parseText(staticClass, options.delimiters);
                    if (res) {
                        warn("class=\"" + staticClass + "\": " +
                            'Interpolation inside attributes has been removed. ' +
                            'Use v-bind or the colon shorthand instead. For example, ' +
                            'instead of <div class="{{ val }}">, use <div :class="val">.', el.rawAttrsMap[
                            'class']);
                    }
                }
                if (staticClass) {
                    el.staticClass = JSON.stringify(staticClass);
                }
                var classBinding = getBindingAttr(el, 'class', false /* getStatic */ );
                if (classBinding) {
                    el.classBinding = classBinding;
                }
            }

            function genData(el) {
                var data = '';
                if (el.staticClass) {
                    data += "staticClass:" + (el.staticClass) + ",";
                }
                if (el.classBinding) {
                    data += "class:" + (el.classBinding) + ",";
                }
                return data
            }
            var klass$1 = {
                staticKeys: ['staticClass'],
                transformNode: transformNode,
                genData: genData
            };
            /*  */
            function transformNode$1(el, options) {
                var warn = options.warn || baseWarn;
                var staticStyle = getAndRemoveAttr(el, 'style');
                if (staticStyle) {
                    /* istanbul ignore if */
                    {
                        var res = parseText(staticStyle, options.delimiters);
                        if (res) {
                            warn("style=\"" + staticStyle + "\": " +
                                'Interpolation inside attributes has been removed. ' +
                                'Use v-bind or the colon shorthand instead. For example, ' +
                                'instead of <div style="{{ val }}">, use <div :style="val">.', el.rawAttrsMap[
                                'style']);
                        }
                    }
                    el.staticStyle = JSON.stringify(parseStyleText(staticStyle));
                }
                var styleBinding = getBindingAttr(el, 'style', false /* getStatic */ );
                if (styleBinding) {
                    el.styleBinding = styleBinding;
                }
            }

            function genData$1(el) {
                var data = '';
                if (el.staticStyle) {
                    data += "staticStyle:" + (el.staticStyle) + ",";
                }
                if (el.styleBinding) {
                    data += "style:(" + (el.styleBinding) + "),";
                }
                return data
            }
            var style$1 = {
                staticKeys: ['staticStyle'],
                transformNode: transformNode$1,
                genData: genData$1
            };
            /*  */
            var decoder;
            var he = {
                decode: function decode(html) {
                    decoder = decoder || document.createElement('div');
                    decoder.innerHTML = html;
                    return decoder.textContent
                }
            };
            /*  */
            var isUnaryTag = makeMap('area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +
                'link,meta,param,source,track,wbr');
            // Elements that you can, intentionally, leave open
            // (and which close themselves)
            var canBeLeftOpenTag = makeMap('colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source');
            // HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
            // Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
            var isNonPhrasingTag = makeMap('address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
                'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
                'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
                'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' + 'title,tr,track');
            /**
             * Not type-checking this file because it's mostly vendor code.
             */
                // Regular Expressions for parsing tags and attributes
            var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
            var dynamicArgAttribute =
                /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+?\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
            var ncname = "[a-zA-Z_][\\-\\.0-9_a-zA-Z" + (unicodeRegExp.source) + "]*";
            var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
            var startTagOpen = new RegExp(("^<" + qnameCapture));
            var startTagClose = /^\s*(\/?)>/;
            var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
            var doctype = /^<!DOCTYPE [^>]+>/i;
            // #7298: escape - to avoid being passed as HTML comment when inlined in page
            var comment = /^<!\--/;
            var conditionalComment = /^<!\[/;
            // Special Elements (can contain anything)
            var isPlainTextElement = makeMap('script,style,textarea', true);
            var reCache = {};
            var decodingMap = {
                '&lt;': '<',
                '&gt;': '>',
                '&quot;': '"',
                '&amp;': '&',
                '&#10;': '\n',
                '&#9;': '\t',
                '&#39;': "'"
            };
            var encodedAttr = /&(?:lt|gt|quot|amp|#39);/g;
            var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g;
            // #5992
            var isIgnoreNewlineTag = makeMap('pre,textarea', true);
            var shouldIgnoreFirstNewline = function(tag, html) {
                return tag && isIgnoreNewlineTag(tag) && html[0] === '\n';
            };

            function decodeAttr(value, shouldDecodeNewlines) {
                var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
                return value.replace(re, function(match) {
                    return decodingMap[match];
                })
            }

            function parseHTML(html, options) {
                var stack = [];
                var expectHTML = options.expectHTML;
                var isUnaryTag$$1 = options.isUnaryTag || no;
                var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;
                var index = 0;
                var last, lastTag;
                while (html) {
                    last = html;
                    // Make sure we're not in a plaintext content element like script/style
                    if (!lastTag || !isPlainTextElement(lastTag)) {
                        var textEnd = html.indexOf('<');
                        if (textEnd === 0) {
                            // Comment:
                            if (comment.test(html)) {
                                var commentEnd = html.indexOf('-->');
                                if (commentEnd >= 0) {
                                    if (options.shouldKeepComment) {
                                        options.comment(html.substring(4, commentEnd), index, index + commentEnd +
                                            3);
                                    }
                                    advance(commentEnd + 3);
                                    continue
                                }
                            }
                            // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
                            if (conditionalComment.test(html)) {
                                var conditionalEnd = html.indexOf(']>');
                                if (conditionalEnd >= 0) {
                                    advance(conditionalEnd + 2);
                                    continue
                                }
                            }
                            // Doctype:
                            var doctypeMatch = html.match(doctype);
                            if (doctypeMatch) {
                                advance(doctypeMatch[0].length);
                                continue
                            }
                            // End tag:
                            var endTagMatch = html.match(endTag);
                            if (endTagMatch) {
                                var curIndex = index;
                                advance(endTagMatch[0].length);
                                parseEndTag(endTagMatch[1], curIndex, index);
                                continue
                            }
                            // Start tag:
                            var startTagMatch = parseStartTag();
                            if (startTagMatch) {
                                handleStartTag(startTagMatch);
                                if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {
                                    advance(1);
                                }
                                continue
                            }
                        }
                        var text = (void 0),
                            rest = (void 0),
                            next = (void 0);
                        if (textEnd >= 0) {
                            rest = html.slice(textEnd);
                            while (!endTag.test(rest) && !startTagOpen.test(rest) && !comment.test(rest) && !
                                conditionalComment.test(rest)) {
                                // < in plain text, be forgiving and treat it as text
                                next = rest.indexOf('<', 1);
                                if (next < 0) {
                                    break
                                }
                                textEnd += next;
                                rest = html.slice(textEnd);
                            }
                            text = html.substring(0, textEnd);
                        }
                        if (textEnd < 0) {
                            text = html;
                        }
                        if (text) {
                            advance(text.length);
                        }
                        if (options.chars && text) {
                            options.chars(text, index - text.length, index);
                        }
                    } else {
                        var endTagLength = 0;
                        var stackedTag = lastTag.toLowerCase();
                        var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp(
                            '([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
                        var rest$1 = html.replace(reStackedTag, function(all, text, endTag) {
                            endTagLength = endTag.length;
                            if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
                                text = text.replace(/<!\--([\s\S]*?)-->/g, '$1') // #7298
                                    .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
                            }
                            if (shouldIgnoreFirstNewline(stackedTag, text)) {
                                text = text.slice(1);
                            }
                            if (options.chars) {
                                options.chars(text);
                            }
                            return ''
                        });
                        index += html.length - rest$1.length;
                        html = rest$1;
                        parseEndTag(stackedTag, index - endTagLength, index);
                    }
                    if (html === last) {
                        options.chars && options.chars(html);
                        if (!stack.length && options.warn) {
                            options.warn(("Mal-formatted tag at end of template: \"" + html + "\""), {
                                start: index + html.length
                            });
                        }
                        break
                    }
                }
                // Clean up any remaining tags
                parseEndTag();

                function advance(n) {
                    index += n;
                    html = html.substring(n);
                }

                function parseStartTag() {
                    var start = html.match(startTagOpen);
                    if (start) {
                        var match = {
                            tagName: start[1],
                            attrs: [],
                            start: index
                        };
                        advance(start[0].length);
                        var end, attr;
                        while (!(end = html.match(startTagClose)) && (attr = html.match(dynamicArgAttribute) || html
                            .match(attribute))) {
                            attr.start = index;
                            advance(attr[0].length);
                            attr.end = index;
                            match.attrs.push(attr);
                        }
                        if (end) {
                            match.unarySlash = end[1];
                            advance(end[0].length);
                            match.end = index;
                            return match
                        }
                    }
                }

                function handleStartTag(match) {
                    var tagName = match.tagName;
                    var unarySlash = match.unarySlash;
                    if (expectHTML) {
                        if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
                            parseEndTag(lastTag);
                        }
                        if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
                            parseEndTag(tagName);
                        }
                    }
                    var unary = isUnaryTag$$1(tagName) || !!unarySlash;
                    var l = match.attrs.length;
                    var attrs = new Array(l);
                    for (var i = 0; i < l; i++) {
                        var args = match.attrs[i];
                        var value = args[3] || args[4] || args[5] || '';
                        var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href' ? options
                            .shouldDecodeNewlinesForHref : options.shouldDecodeNewlines;
                        attrs[i] = {
                            name: args[1],
                            value: decodeAttr(value, shouldDecodeNewlines)
                        };
                        if (options.outputSourceRange) {
                            attrs[i].start = args.start + args[0].match(/^\s*/).length;
                            attrs[i].end = args.end;
                        }
                    }
                    if (!unary) {
                        stack.push({
                            tag: tagName,
                            lowerCasedTag: tagName.toLowerCase(),
                            attrs: attrs,
                            start: match.start,
                            end: match.end
                        });
                        lastTag = tagName;
                    }
                    if (options.start) {
                        options.start(tagName, attrs, unary, match.start, match.end);
                    }
                }

                function parseEndTag(tagName, start, end) {
                    var pos, lowerCasedTagName;
                    if (start == null) {
                        start = index;
                    }
                    if (end == null) {
                        end = index;
                    }
                    // Find the closest opened tag of the same type
                    if (tagName) {
                        lowerCasedTagName = tagName.toLowerCase();
                        for (pos = stack.length - 1; pos >= 0; pos--) {
                            if (stack[pos].lowerCasedTag === lowerCasedTagName) {
                                break
                            }
                        }
                    } else {
                        // If no tag name is provided, clean shop
                        pos = 0;
                    }
                    if (pos >= 0) {
                        // Close all the open elements, up the stack
                        for (var i = stack.length - 1; i >= pos; i--) {
                            if (i > pos || !tagName && options.warn) {
                                options.warn(
                                    ("tag <" + (stack[i].tag) + "> has no matching end tag."), {
                                        start: stack[i].start,
                                        end: stack[i].end
                                    });
                            }
                            if (options.end) {
                                options.end(stack[i].tag, start, end);
                            }
                        }
                        // Remove the open elements from the stack
                        stack.length = pos;
                        lastTag = pos && stack[pos - 1].tag;
                    } else if (lowerCasedTagName === 'br') {
                        if (options.start) {
                            options.start(tagName, [], true, start, end);
                        }
                    } else if (lowerCasedTagName === 'p') {
                        if (options.start) {
                            options.start(tagName, [], false, start, end);
                        }
                        if (options.end) {
                            options.end(tagName, start, end);
                        }
                    }
                }
            }
            /*  */
            var onRE = /^@|^v-on:/;
            var dirRE = /^v-|^@|^:|^#/;
            var forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
            var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
            var stripParensRE = /^\(|\)$/g;
            var dynamicArgRE = /^\[.*\]$/;
            var argRE = /:(.*)$/;
            var bindRE = /^:|^\.|^v-bind:/;
            var modifierRE = /\.[^.\]]+(?=[^\]]*$)/g;
            var slotRE = /^v-slot(:|$)|^#/;
            var lineBreakRE = /[\r\n]/;
            var whitespaceRE$1 = /[ \f\t\r\n]+/g;
            var invalidAttributeRE = /[\s"'<>\/=]/;
            var decodeHTMLCached = cached(he.decode);
            var emptySlotScopeToken = "_empty_";
            // configurable state
            var warn$2;
            var delimiters;
            var transforms;
            var preTransforms;
            var postTransforms;
            var platformIsPreTag;
            var platformMustUseProp;
            var platformGetTagNamespace;
            var maybeComponent;

            function createASTElement(tag, attrs, parent) {
                return {
                    type: 1,
                    tag: tag,
                    attrsList: attrs,
                    attrsMap: makeAttrsMap(attrs),
                    rawAttrsMap: {},
                    parent: parent,
                    children: []
                }
            }
            /**
             * Convert HTML string to AST.
             */
            function parse(template, options) {
                warn$2 = options.warn || baseWarn;
                platformIsPreTag = options.isPreTag || no;
                platformMustUseProp = options.mustUseProp || no;
                platformGetTagNamespace = options.getTagNamespace || no;
                var isReservedTag = options.isReservedTag || no;
                maybeComponent = function(el) {
                    return !!(el.component || el.attrsMap[':is'] || el.attrsMap['v-bind:is'] || !(el.attrsMap
                        .is ? isReservedTag(el.attrsMap.is) : isReservedTag(el.tag)));
                };
                transforms = pluckModuleFunction(options.modules, 'transformNode');
                preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
                postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
                delimiters = options.delimiters;
                var stack = [];
                var preserveWhitespace = options.preserveWhitespace !== false;
                var whitespaceOption = options.whitespace;
                var root;
                var currentParent;
                var inVPre = false;
                var inPre = false;
                var warned = false;

                function warnOnce(msg, range) {
                    if (!warned) {
                        warned = true;
                        warn$2(msg, range);
                    }
                }

                function closeElement(element) {
                    trimEndingWhitespace(element);
                    if (!inVPre && !element.processed) {
                        element = processElement(element, options);
                    }
                    // tree management
                    if (!stack.length && element !== root) {
                        // allow root elements with v-if, v-else-if and v-else
                        if (root.if && (element.elseif || element.else)) {
                            {
                                checkRootConstraints(element);
                            }
                            addIfCondition(root, {
                                exp: element.elseif,
                                block: element
                            });
                        } else {
                            warnOnce("Component template should contain exactly one root element. " +
                                "If you are using v-if on multiple elements, " +
                                "use v-else-if to chain them instead.", {
                                start: element.start
                            });
                        }
                    }
                    if (currentParent && !element.forbidden) {
                        if (element.elseif || element.else) {
                            processIfConditions(element, currentParent);
                        } else {
                            if (element.slotScope) {
                                // scoped slot
                                // keep it in the children list so that v-else(-if) conditions can
                                // find it as the prev node.
                                var name = element.slotTarget || '"default"';
                                (currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
                            }
                            currentParent.children.push(element);
                            element.parent = currentParent;
                        }
                    }
                    // final children cleanup
                    // filter out scoped slots
                    element.children = element.children.filter(function(c) {
                        return !(c).slotScope;
                    });
                    // remove trailing whitespace node again
                    trimEndingWhitespace(element);
                    // check pre state
                    if (element.pre) {
                        inVPre = false;
                    }
                    if (platformIsPreTag(element.tag)) {
                        inPre = false;
                    }
                    // apply post-transforms
                    for (var i = 0; i < postTransforms.length; i++) {
                        postTransforms[i](element, options);
                    }
                }

                function trimEndingWhitespace(el) {
                    // remove trailing whitespace node
                    if (!inPre) {
                        var lastNode;
                        while (
                            (lastNode = el.children[el.children.length - 1]) && lastNode.type === 3 && lastNode
                                .text === ' ') {
                            el.children.pop();
                        }
                    }
                }

                function checkRootConstraints(el) {
                    if (el.tag === 'slot' || el.tag === 'template') {
                        warnOnce("Cannot use <" + (el.tag) + "> as component root element because it may " +
                            'contain multiple nodes.', {
                            start: el.start
                        });
                    }
                    if (el.attrsMap.hasOwnProperty('v-for')) {
                        warnOnce('Cannot use v-for on stateful component root element because ' +
                            'it renders multiple elements.', el.rawAttrsMap['v-for']);
                    }
                }
                parseHTML(template, {
                    warn: warn$2,
                    expectHTML: options.expectHTML,
                    isUnaryTag: options.isUnaryTag,
                    canBeLeftOpenTag: options.canBeLeftOpenTag,
                    shouldDecodeNewlines: options.shouldDecodeNewlines,
                    shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
                    shouldKeepComment: options.comments,
                    outputSourceRange: options.outputSourceRange,
                    start: function start(tag, attrs, unary, start$1, end) {
                        // check namespace.
                        // inherit parent ns if there is one
                        var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
                        // handle IE svg bug
                        /* istanbul ignore if */
                        if (isIE && ns === 'svg') {
                            attrs = guardIESVGBug(attrs);
                        }
                        var element = createASTElement(tag, attrs, currentParent);
                        if (ns) {
                            element.ns = ns;
                        } {
                            if (options.outputSourceRange) {
                                element.start = start$1;
                                element.end = end;
                                element.rawAttrsMap = element.attrsList.reduce(function(cumulated,
                                                                                        attr) {
                                    cumulated[attr.name] = attr;
                                    return cumulated
                                }, {});
                            }
                            attrs.forEach(function(attr) {
                                if (invalidAttributeRE.test(attr.name)) {
                                    warn$2("Invalid dynamic argument expression: attribute names cannot contain " +
                                        "spaces, quotes, <, >, / or =.", {
                                        start: attr.start + attr.name.indexOf("["),
                                        end: attr.start + attr.name.length
                                    });
                                }
                            });
                        }
                        if (isForbiddenTag(element) && !isServerRendering()) {
                            element.forbidden = true;
                            warn$2('Templates should only be responsible for mapping the state to the ' +
                                'UI. Avoid placing tags with side-effects in your templates, such as ' +
                                "<" + tag + ">" + ', as they will not be parsed.', {
                                start: element.start
                            });
                        }
                        // apply pre-transforms
                        for (var i = 0; i < preTransforms.length; i++) {
                            element = preTransforms[i](element, options) || element;
                        }
                        if (!inVPre) {
                            processPre(element);
                            if (element.pre) {
                                inVPre = true;
                            }
                        }
                        if (platformIsPreTag(element.tag)) {
                            inPre = true;
                        }
                        if (inVPre) {
                            processRawAttrs(element);
                        } else if (!element.processed) {
                            // structural directives
                            processFor(element);
                            processIf(element);
                            processOnce(element);
                        }
                        if (!root) {
                            root = element; {
                                checkRootConstraints(root);
                            }
                        }
                        if (!unary) {
                            currentParent = element;
                            stack.push(element);
                        } else {
                            closeElement(element);
                        }
                    },
                    end: function end(tag, start, end$1) {
                        var element = stack[stack.length - 1];
                        // pop stack
                        stack.length -= 1;
                        currentParent = stack[stack.length - 1];
                        if (options.outputSourceRange) {
                            element.end = end$1;
                        }
                        closeElement(element);
                    },
                    chars: function chars(text, start, end) {
                        if (!currentParent) {
                            {
                                if (text === template) {
                                    warnOnce(
                                        'Component template requires a root element, rather than just text.', {
                                            start: start
                                        });
                                } else if ((text = text.trim())) {
                                    warnOnce(
                                        ("text \"" + text +
                                            "\" outside root element will be ignored."), {
                                            start: start
                                        });
                                }
                            }
                            return
                        }
                        // IE textarea placeholder bug
                        /* istanbul ignore if */
                        if (isIE && currentParent.tag === 'textarea' && currentParent.attrsMap
                            .placeholder === text) {
                            return
                        }
                        var children = currentParent.children;
                        if (inPre || text.trim()) {
                            text = isTextTag(currentParent) ? text : decodeHTMLCached(text);
                        } else if (!children.length) {
                            // remove the whitespace-only node right after an opening tag
                            text = '';
                        } else if (whitespaceOption) {
                            if (whitespaceOption === 'condense') {
                                // in condense mode, remove the whitespace node if it contains
                                // line break, otherwise condense to a single space
                                text = lineBreakRE.test(text) ? '' : ' ';
                            } else {
                                text = ' ';
                            }
                        } else {
                            text = preserveWhitespace ? ' ' : '';
                        }
                        if (text) {
                            if (!inPre && whitespaceOption === 'condense') {
                                // condense consecutive whitespaces into single space
                                text = text.replace(whitespaceRE$1, ' ');
                            }
                            var res;
                            var child;
                            if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
                                child = {
                                    type: 2,
                                    expression: res.expression,
                                    tokens: res.tokens,
                                    text: text
                                };
                            } else if (text !== ' ' || !children.length || children[children.length - 1]
                                .text !== ' ') {
                                child = {
                                    type: 3,
                                    text: text
                                };
                            }
                            if (child) {
                                if (options.outputSourceRange) {
                                    child.start = start;
                                    child.end = end;
                                }
                                children.push(child);
                            }
                        }
                    },
                    comment: function comment(text, start, end) {
                        // adding anything as a sibling to the root node is forbidden
                        // comments should still be allowed, but ignored
                        if (currentParent) {
                            var child = {
                                type: 3,
                                text: text,
                                isComment: true
                            };
                            if (options.outputSourceRange) {
                                child.start = start;
                                child.end = end;
                            }
                            currentParent.children.push(child);
                        }
                    }
                });
                return root
            }

            function processPre(el) {
                if (getAndRemoveAttr(el, 'v-pre') != null) {
                    el.pre = true;
                }
            }

            function processRawAttrs(el) {
                var list = el.attrsList;
                var len = list.length;
                if (len) {
                    var attrs = el.attrs = new Array(len);
                    for (var i = 0; i < len; i++) {
                        attrs[i] = {
                            name: list[i].name,
                            value: JSON.stringify(list[i].value)
                        };
                        if (list[i].start != null) {
                            attrs[i].start = list[i].start;
                            attrs[i].end = list[i].end;
                        }
                    }
                } else if (!el.pre) {
                    // non root node in pre blocks with no attributes
                    el.plain = true;
                }
            }

            function processElement(element, options) {
                processKey(element);
                // determine whether this is a plain element after
                // removing structural attributes
                element.plain = (!element.key && !element.scopedSlots && !element.attrsList.length);
                processRef(element);
                processSlotContent(element);
                processSlotOutlet(element);
                processComponent(element);
                for (var i = 0; i < transforms.length; i++) {
                    element = transforms[i](element, options) || element;
                }
                processAttrs(element);
                return element
            }

            function processKey(el) {
                var exp = getBindingAttr(el, 'key');
                if (exp) {
                    {
                        if (el.tag === 'template') {
                            warn$2("<template> cannot be keyed. Place the key on real elements instead.",
                                getRawBindingAttr(el, 'key'));
                        }
                        if (el.for) {
                            var iterator = el.iterator2 || el.iterator1;
                            var parent = el.parent;
                            if (iterator && iterator === exp && parent && parent.tag === 'transition-group') {
                                warn$2("Do not use v-for index as key on <transition-group> children, " +
                                    "this is the same as not using keys.", getRawBindingAttr(el, 'key'),
                                    true /* tip */ );
                            }
                        }
                    }
                    el.key = exp;
                }
            }

            function processRef(el) {
                var ref = getBindingAttr(el, 'ref');
                if (ref) {
                    el.ref = ref;
                    el.refInFor = checkInFor(el);
                }
            }

            function processFor(el) {
                var exp;
                if ((exp = getAndRemoveAttr(el, 'v-for'))) {
                    var res = parseFor(exp);
                    if (res) {
                        extend(el, res);
                    } else {
                        warn$2(
                            ("Invalid v-for expression: " + exp), el.rawAttrsMap['v-for']);
                    }
                }
            }

            function parseFor(exp) {
                var inMatch = exp.match(forAliasRE);
                if (!inMatch) {
                    return
                }
                var res = {};
                res.for = inMatch[2].trim();
                var alias = inMatch[1].trim().replace(stripParensRE, '');
                var iteratorMatch = alias.match(forIteratorRE);
                if (iteratorMatch) {
                    res.alias = alias.replace(forIteratorRE, '').trim();
                    res.iterator1 = iteratorMatch[1].trim();
                    if (iteratorMatch[2]) {
                        res.iterator2 = iteratorMatch[2].trim();
                    }
                } else {
                    res.alias = alias;
                }
                return res
            }

            function processIf(el) {
                var exp = getAndRemoveAttr(el, 'v-if');
                if (exp) {
                    el.if = exp;
                    addIfCondition(el, {
                        exp: exp,
                        block: el
                    });
                } else {
                    if (getAndRemoveAttr(el, 'v-else') != null) {
                        el.else = true;
                    }
                    var elseif = getAndRemoveAttr(el, 'v-else-if');
                    if (elseif) {
                        el.elseif = elseif;
                    }
                }
            }

            function processIfConditions(el, parent) {
                var prev = findPrevElement(parent.children);
                if (prev && prev.if) {
                    addIfCondition(prev, {
                        exp: el.elseif,
                        block: el
                    });
                } else {
                    warn$2("v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
                        "used on element <" + (el.tag) + "> without corresponding v-if.", el.rawAttrsMap[el
                        .elseif ? 'v-else-if' : 'v-else']);
                }
            }

            function findPrevElement(children) {
                var i = children.length;
                while (i--) {
                    if (children[i].type === 1) {
                        return children[i]
                    } else {
                        if (children[i].text !== ' ') {
                            warn$2("text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
                                "will be ignored.", children[i]);
                        }
                        children.pop();
                    }
                }
            }

            function addIfCondition(el, condition) {
                if (!el.ifConditions) {
                    el.ifConditions = [];
                }
                el.ifConditions.push(condition);
            }

            function processOnce(el) {
                var once$$1 = getAndRemoveAttr(el, 'v-once');
                if (once$$1 != null) {
                    el.once = true;
                }
            }
            // handle content being passed to a component as slot,
            // e.g. <template slot="xxx">, <div slot-scope="xxx">
            function processSlotContent(el) {
                var slotScope;
                if (el.tag === 'template') {
                    slotScope = getAndRemoveAttr(el, 'scope');
                    /* istanbul ignore if */
                    if (slotScope) {
                        warn$2("the \"scope\" attribute for scoped slots have been deprecated and " +
                            "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
                            "can also be used on plain elements in addition to <template> to " +
                            "denote scoped slots.", el.rawAttrsMap['scope'], true);
                    }
                    el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
                } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
                    /* istanbul ignore if */
                    if (el.attrsMap['v-for']) {
                        warn$2("Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
                            "(v-for takes higher priority). Use a wrapper <template> for the " +
                            "scoped slot to make it clearer.", el.rawAttrsMap['slot-scope'], true);
                    }
                    el.slotScope = slotScope;
                }
                // slot="xxx"
                var slotTarget = getBindingAttr(el, 'slot');
                if (slotTarget) {
                    el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
                    el.slotTargetDynamic = !!(el.attrsMap[':slot'] || el.attrsMap['v-bind:slot']);
                    // preserve slot as an attribute for native shadow DOM compat
                    // only for non-scoped slots.
                    if (el.tag !== 'template' && !el.slotScope) {
                        addAttr(el, 'slot', slotTarget, getRawBindingAttr(el, 'slot'));
                    }
                }
                // 2.6 v-slot syntax
                {
                    if (el.tag === 'template') {
                        // v-slot on <template>
                        var slotBinding = getAndRemoveAttrByRegex(el, slotRE);
                        if (slotBinding) {
                            {
                                if (el.slotTarget || el.slotScope) {
                                    warn$2("Unexpected mixed usage of different slot syntaxes.", el);
                                }
                                if (el.parent && !maybeComponent(el.parent)) {
                                    warn$2("<template v-slot> can only appear at the root level inside " +
                                        "the receiving component", el);
                                }
                            }
                            var ref = getSlotName(slotBinding);
                            var name = ref.name;
                            var dynamic = ref.dynamic;
                            el.slotTarget = name;
                            el.slotTargetDynamic = dynamic;
                            el.slotScope = slotBinding.value ||
                                emptySlotScopeToken; // force it into a scoped slot for perf
                        }
                    } else {
                        // v-slot on component, denotes default slot
                        var slotBinding$1 = getAndRemoveAttrByRegex(el, slotRE);
                        if (slotBinding$1) {
                            {
                                if (!maybeComponent(el)) {
                                    warn$2("v-slot can only be used on components or <template>.", slotBinding$1);
                                }
                                if (el.slotScope || el.slotTarget) {
                                    warn$2("Unexpected mixed usage of different slot syntaxes.", el);
                                }
                                if (el.scopedSlots) {
                                    warn$2("To avoid scope ambiguity, the default slot should also use " +
                                        "<template> syntax when there are other named slots.", slotBinding$1);
                                }
                            }
                            // add the component's children to its default slot
                            var slots = el.scopedSlots || (el.scopedSlots = {});
                            var ref$1 = getSlotName(slotBinding$1);
                            var name$1 = ref$1.name;
                            var dynamic$1 = ref$1.dynamic;
                            var slotContainer = slots[name$1] = createASTElement('template', [], el);
                            slotContainer.slotTarget = name$1;
                            slotContainer.slotTargetDynamic = dynamic$1;
                            slotContainer.children = el.children.filter(function(c) {
                                if (!c.slotScope) {
                                    c.parent = slotContainer;
                                    return true
                                }
                            });
                            slotContainer.slotScope = slotBinding$1.value || emptySlotScopeToken;
                            // remove children as they are returned from scopedSlots now
                            el.children = [];
                            // mark el non-plain so data gets generated
                            el.plain = false;
                        }
                    }
                }
            }

            function getSlotName(binding) {
                var name = binding.name.replace(slotRE, '');
                if (!name) {
                    if (binding.name[0] !== '#') {
                        name = 'default';
                    } else {
                        warn$2("v-slot shorthand syntax requires a slot name.", binding);
                    }
                }
                return dynamicArgRE.test(name)
                    // dynamic [name]
                    ? {
                        name: name.slice(1, -1),
                        dynamic: true
                    }
                    // static name
                    : {
                        name: ("\"" + name + "\""),
                        dynamic: false
                    }
            }
            // handle <slot/> outlets
            function processSlotOutlet(el) {
                if (el.tag === 'slot') {
                    el.slotName = getBindingAttr(el, 'name');
                    if (el.key) {
                        warn$2("`key` does not work on <slot> because slots are abstract outlets " +
                            "and can possibly expand into multiple elements. " +
                            "Use the key on a wrapping element instead.", getRawBindingAttr(el, 'key'));
                    }
                }
            }

            function processComponent(el) {
                var binding;
                if ((binding = getBindingAttr(el, 'is'))) {
                    el.component = binding;
                }
                if (getAndRemoveAttr(el, 'inline-template') != null) {
                    el.inlineTemplate = true;
                }
            }

            function processAttrs(el) {
                var list = el.attrsList;
                var i, l, name, rawName, value, modifiers, syncGen, isDynamic;
                for (i = 0, l = list.length; i < l; i++) {
                    name = rawName = list[i].name;
                    value = list[i].value;
                    if (dirRE.test(name)) {
                        // mark element as dynamic
                        el.hasBindings = true;
                        // modifiers
                        modifiers = parseModifiers(name.replace(dirRE, ''));
                        // support .foo shorthand syntax for the .prop modifier
                        if (modifiers) {
                            name = name.replace(modifierRE, '');
                        }
                        if (bindRE.test(name)) { // v-bind
                            name = name.replace(bindRE, '');
                            value = parseFilters(value);
                            isDynamic = dynamicArgRE.test(name);
                            if (isDynamic) {
                                name = name.slice(1, -1);
                            }
                            if (value.trim().length === 0) {
                                warn$2(
                                    ("The value for a v-bind expression cannot be empty. Found in \"v-bind:" +
                                        name + "\""));
                            }
                            if (modifiers) {
                                if (modifiers.prop && !isDynamic) {
                                    name = camelize(name);
                                    if (name === 'innerHtml') {
                                        name = 'innerHTML';
                                    }
                                }
                                if (modifiers.camel && !isDynamic) {
                                    name = camelize(name);
                                }
                                if (modifiers.sync) {
                                    syncGen = genAssignmentCode(value, "$event");
                                    if (!isDynamic) {
                                        addHandler(el,
                                            ("update:" + (camelize(name))), syncGen, null, false, warn$2, list[i]
                                        );
                                        if (hyphenate(name) !== camelize(name)) {
                                            addHandler(el,
                                                ("update:" + (hyphenate(name))), syncGen, null, false, warn$2,
                                                list[i]);
                                        }
                                    } else {
                                        // handler w/ dynamic event name
                                        addHandler(el,
                                            ("\"update:\"+(" + name + ")"), syncGen, null, false, warn$2, list[
                                                i], true // dynamic
                                        );
                                    }
                                }
                            }
                            if ((modifiers && modifiers.prop) || (!el.component && platformMustUseProp(el.tag, el
                                .attrsMap.type, name))) {
                                addProp(el, name, value, list[i], isDynamic);
                            } else {
                                addAttr(el, name, value, list[i], isDynamic);
                            }
                        } else if (onRE.test(name)) { // v-on
                            name = name.replace(onRE, '');
                            isDynamic = dynamicArgRE.test(name);
                            if (isDynamic) {
                                name = name.slice(1, -1);
                            }
                            addHandler(el, name, value, modifiers, false, warn$2, list[i], isDynamic);
                        } else { // normal directives
                            name = name.replace(dirRE, '');
                            // parse arg
                            var argMatch = name.match(argRE);
                            var arg = argMatch && argMatch[1];
                            isDynamic = false;
                            if (arg) {
                                name = name.slice(0, -(arg.length + 1));
                                if (dynamicArgRE.test(arg)) {
                                    arg = arg.slice(1, -1);
                                    isDynamic = true;
                                }
                            }
                            addDirective(el, name, rawName, value, arg, isDynamic, modifiers, list[i]);
                            if (name === 'model') {
                                checkForAliasModel(el, value);
                            }
                        }
                    } else {
                        // literal attribute
                        {
                            var res = parseText(value, delimiters);
                            if (res) {
                                warn$2(name + "=\"" + value + "\": " +
                                    'Interpolation inside attributes has been removed. ' +
                                    'Use v-bind or the colon shorthand instead. For example, ' +
                                    'instead of <div id="{{ val }}">, use <div :id="val">.', list[i]);
                            }
                        }
                        addAttr(el, name, JSON.stringify(value), list[i]);
                        // #6887 firefox doesn't update muted state if set via attribute
                        // even immediately after element creation
                        if (!el.component && name === 'muted' && platformMustUseProp(el.tag, el.attrsMap.type,
                            name)) {
                            addProp(el, name, 'true', list[i]);
                        }
                    }
                }
            }

            function checkInFor(el) {
                var parent = el;
                while (parent) {
                    if (parent.for !== undefined) {
                        return true
                    }
                    parent = parent.parent;
                }
                return false
            }

            function parseModifiers(name) {
                var match = name.match(modifierRE);
                if (match) {
                    var ret = {};
                    match.forEach(function(m) {
                        ret[m.slice(1)] = true;
                    });
                    return ret
                }
            }

            function makeAttrsMap(attrs) {
                var map = {};
                for (var i = 0, l = attrs.length; i < l; i++) {
                    if (map[attrs[i].name] && !isIE && !isEdge) {
                        warn$2('duplicate attribute: ' + attrs[i].name, attrs[i]);
                    }
                    map[attrs[i].name] = attrs[i].value;
                }
                return map
            }
            // for script (e.g. type="x/template") or style, do not decode content
            function isTextTag(el) {
                return el.tag === 'script' || el.tag === 'style'
            }

            function isForbiddenTag(el) {
                return (el.tag === 'style' || (el.tag === 'script' && (!el.attrsMap.type || el.attrsMap.type ===
                    'text/javascript')))
            }
            var ieNSBug = /^xmlns:NS\d+/;
            var ieNSPrefix = /^NS\d+:/;
            /* istanbul ignore next */
            function guardIESVGBug(attrs) {
                var res = [];
                for (var i = 0; i < attrs.length; i++) {
                    var attr = attrs[i];
                    if (!ieNSBug.test(attr.name)) {
                        attr.name = attr.name.replace(ieNSPrefix, '');
                        res.push(attr);
                    }
                }
                return res
            }

            function checkForAliasModel(el, value) {
                var _el = el;
                while (_el) {
                    if (_el.for && _el.alias === value) {
                        warn$2("<" + (el.tag) + " v-model=\"" + value + "\">: " +
                            "You are binding v-model directly to a v-for iteration alias. " +
                            "This will not be able to modify the v-for source array because " +
                            "writing to the alias is like modifying a function local variable. " +
                            "Consider using an array of objects and use v-model on an object property instead.",
                            el.rawAttrsMap['v-model']);
                    }
                    _el = _el.parent;
                }
            }
            /*  */
            function preTransformNode(el, options) {
                if (el.tag === 'input') {
                    var map = el.attrsMap;
                    if (!map['v-model']) {
                        return
                    }
                    var typeBinding;
                    if (map[':type'] || map['v-bind:type']) {
                        typeBinding = getBindingAttr(el, 'type');
                    }
                    if (!map.type && !typeBinding && map['v-bind']) {
                        typeBinding = "(" + (map['v-bind']) + ").type";
                    }
                    if (typeBinding) {
                        var ifCondition = getAndRemoveAttr(el, 'v-if', true);
                        var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
                        var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
                        var elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true);
                        // 1. checkbox
                        var branch0 = cloneASTElement(el);
                        // process for on the main node
                        processFor(branch0);
                        addRawAttr(branch0, 'type', 'checkbox');
                        processElement(branch0, options);
                        branch0.processed = true; // prevent it from double-processed
                        branch0.if = "(" + typeBinding + ")==='checkbox'" + ifConditionExtra;
                        addIfCondition(branch0, {
                            exp: branch0.if,
                            block: branch0
                        });
                        // 2. add radio else-if condition
                        var branch1 = cloneASTElement(el);
                        getAndRemoveAttr(branch1, 'v-for', true);
                        addRawAttr(branch1, 'type', 'radio');
                        processElement(branch1, options);
                        addIfCondition(branch0, {
                            exp: "(" + typeBinding + ")==='radio'" + ifConditionExtra,
                            block: branch1
                        });
                        // 3. other
                        var branch2 = cloneASTElement(el);
                        getAndRemoveAttr(branch2, 'v-for', true);
                        addRawAttr(branch2, ':type', typeBinding);
                        processElement(branch2, options);
                        addIfCondition(branch0, {
                            exp: ifCondition,
                            block: branch2
                        });
                        if (hasElse) {
                            branch0.else = true;
                        } else if (elseIfCondition) {
                            branch0.elseif = elseIfCondition;
                        }
                        return branch0
                    }
                }
            }

            function cloneASTElement(el) {
                return createASTElement(el.tag, el.attrsList.slice(), el.parent)
            }
            var model$1 = {
                preTransformNode: preTransformNode
            };
            var modules$1 = [
                klass$1,
                style$1,
                model$1
            ];
            /*  */
            function text(el, dir) {
                if (dir.value) {
                    addProp(el, 'textContent', ("_s(" + (dir.value) + ")"), dir);
                }
            }
            /*  */
            function html(el, dir) {
                if (dir.value) {
                    addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"), dir);
                }
            }
            var directives$1 = {
                model: model,
                text: text,
                html: html
            };
            /*  */
            var baseOptions = {
                expectHTML: true,
                modules: modules$1,
                directives: directives$1,
                isPreTag: isPreTag,
                isUnaryTag: isUnaryTag,
                mustUseProp: mustUseProp,
                canBeLeftOpenTag: canBeLeftOpenTag,
                isReservedTag: isReservedTag,
                getTagNamespace: getTagNamespace,
                staticKeys: genStaticKeys(modules$1)
            };
            /*  */
            var isStaticKey;
            var isPlatformReservedTag;
            var genStaticKeysCached = cached(genStaticKeys$1);
            /**
             * Goal of the optimizer: walk the generated template AST tree
             * and detect sub-trees that are purely static, i.e. parts of
             * the DOM that never needs to change.
             *
             * Once we detect these sub-trees, we can:
             *
             * 1. Hoist them into constants, so that we no longer need to
             *    create fresh nodes for them on each re-render;
             * 2. Completely skip them in the patching process.
             */
            function optimize(root, options) {
                if (!root) {
                    return
                }
                isStaticKey = genStaticKeysCached(options.staticKeys || '');
                isPlatformReservedTag = options.isReservedTag || no;
                // first pass: mark all non-static nodes.
                markStatic$1(root);
                // second pass: mark static roots.
                markStaticRoots(root, false);
            }

            function genStaticKeys$1(keys) {
                return makeMap('type,tag,attrsList,attrsMap,plain,parent,children,attrs,start,end,rawAttrsMap' + (
                    keys ? ',' + keys : ''))
            }

            function markStatic$1(node) {
                node.static = isStatic(node);
                if (node.type === 1) {
                    // do not make component slot content static. this avoids
                    // 1. components not able to mutate slot nodes
                    // 2. static slot content fails for hot-reloading
                    if (!isPlatformReservedTag(node.tag) && node.tag !== 'slot' && node.attrsMap[
                        'inline-template'] == null) {
                        return
                    }
                    for (var i = 0, l = node.children.length; i < l; i++) {
                        var child = node.children[i];
                        markStatic$1(child);
                        if (!child.static) {
                            node.static = false;
                        }
                    }
                    if (node.ifConditions) {
                        for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
                            var block = node.ifConditions[i$1].block;
                            markStatic$1(block);
                            if (!block.static) {
                                node.static = false;
                            }
                        }
                    }
                }
            }

            function markStaticRoots(node, isInFor) {
                if (node.type === 1) {
                    if (node.static || node.once) {
                        node.staticInFor = isInFor;
                    }
                    // For a node to qualify as a static root, it should have children that
                    // are not just static text. Otherwise the cost of hoisting out will
                    // outweigh the benefits and it's better off to just always render it fresh.
                    if (node.static && node.children.length && !(node.children.length === 1 && node.children[0]
                        .type === 3)) {
                        node.staticRoot = true;
                        return
                    } else {
                        node.staticRoot = false;
                    }
                    if (node.children) {
                        for (var i = 0, l = node.children.length; i < l; i++) {
                            markStaticRoots(node.children[i], isInFor || !!node.for);
                        }
                    }
                    if (node.ifConditions) {
                        for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
                            markStaticRoots(node.ifConditions[i$1].block, isInFor);
                        }
                    }
                }
            }

            function isStatic(node) {
                if (node.type === 2) { // expression
                    return false
                }
                if (node.type === 3) { // text
                    return true
                }
                return !!(node.pre || (!node.hasBindings && // no dynamic bindings
                    !node.if && !node.for && // not v-if or v-for or v-else
                    !isBuiltInTag(node.tag) && // not a built-in
                    isPlatformReservedTag(node.tag) && // not a component
                    !isDirectChildOfTemplateFor(node) && Object.keys(node).every(isStaticKey)))
            }

            function isDirectChildOfTemplateFor(node) {
                while (node.parent) {
                    node = node.parent;
                    if (node.tag !== 'template') {
                        return false
                    }
                    if (node.for) {
                        return true
                    }
                }
                return false
            }
            /*  */
            var fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function(?:\s+[\w$]+)?\s*\(/;
            var fnInvokeRE = /\([^)]*?\);*$/;
            var simplePathRE =
                /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/;
            // KeyboardEvent.keyCode aliases
            var keyCodes = {
                esc: 27,
                tab: 9,
                enter: 13,
                space: 32,
                up: 38,
                left: 37,
                right: 39,
                down: 40,
                'delete': [8, 46]
            };
            // KeyboardEvent.key aliases
            var keyNames = {
                // #7880: IE11 and Edge use `Esc` for Escape key name.
                esc: ['Esc', 'Escape'],
                tab: 'Tab',
                enter: 'Enter',
                // #9112: IE11 uses `Spacebar` for Space key name.
                space: [' ', 'Spacebar'],
                // #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
                up: ['Up', 'ArrowUp'],
                left: ['Left', 'ArrowLeft'],
                right: ['Right', 'ArrowRight'],
                down: ['Down', 'ArrowDown'],
                // #9112: IE11 uses `Del` for Delete key name.
                'delete': ['Backspace', 'Delete', 'Del']
            };
            // #4868: modifiers that prevent the execution of the listener
            // need to explicitly return null so that we can determine whether to remove
            // the listener for .once
            var genGuard = function(condition) {
                return ("if(" + condition + ")return null;");
            };
            var modifierCode = {
                stop: '$event.stopPropagation();',
                prevent: '$event.preventDefault();',
                self: genGuard("$event.target !== $event.currentTarget"),
                ctrl: genGuard("!$event.ctrlKey"),
                shift: genGuard("!$event.shiftKey"),
                alt: genGuard("!$event.altKey"),
                meta: genGuard("!$event.metaKey"),
                left: genGuard("'button' in $event && $event.button !== 0"),
                middle: genGuard("'button' in $event && $event.button !== 1"),
                right: genGuard("'button' in $event && $event.button !== 2")
            };

            function genHandlers(events, isNative) {
                var prefix = isNative ? 'nativeOn:' : 'on:';
                var staticHandlers = "";
                var dynamicHandlers = "";
                for (var name in events) {
                    var handlerCode = genHandler(events[name]);
                    if (events[name] && events[name].dynamic) {
                        dynamicHandlers += name + "," + handlerCode + ",";
                    } else {
                        staticHandlers += "\"" + name + "\":" + handlerCode + ",";
                    }
                }
                staticHandlers = "{" + (staticHandlers.slice(0, -1)) + "}";
                if (dynamicHandlers) {
                    return prefix + "_d(" + staticHandlers + ",[" + (dynamicHandlers.slice(0, -1)) + "])"
                } else {
                    return prefix + staticHandlers
                }
            }

            function genHandler(handler) {
                if (!handler) {
                    return 'function(){}'
                }
                if (Array.isArray(handler)) {
                    return ("[" + (handler.map(function(handler) {
                        return genHandler(handler);
                    }).join(',')) + "]")
                }
                var isMethodPath = simplePathRE.test(handler.value);
                var isFunctionExpression = fnExpRE.test(handler.value);
                var isFunctionInvocation = simplePathRE.test(handler.value.replace(fnInvokeRE, ''));
                if (!handler.modifiers) {
                    if (isMethodPath || isFunctionExpression) {
                        return handler.value
                    }
                    return ("function($event){" + (isFunctionInvocation ? ("return " + (handler.value)) : handler
                        .value) + "}") // inline statement
                } else {
                    var code = '';
                    var genModifierCode = '';
                    var keys = [];
                    for (var key in handler.modifiers) {
                        if (modifierCode[key]) {
                            genModifierCode += modifierCode[key];
                            // left/right
                            if (keyCodes[key]) {
                                keys.push(key);
                            }
                        } else if (key === 'exact') {
                            var modifiers = (handler.modifiers);
                            genModifierCode += genGuard(
                                ['ctrl', 'shift', 'alt', 'meta'].filter(function(keyModifier) {
                                    return !modifiers[keyModifier];
                                }).map(function(keyModifier) {
                                    return ("$event." + keyModifier + "Key");
                                }).join('||'));
                        } else {
                            keys.push(key);
                        }
                    }
                    if (keys.length) {
                        code += genKeyFilter(keys);
                    }
                    // Make sure modifiers like prevent and stop get executed after key filtering
                    if (genModifierCode) {
                        code += genModifierCode;
                    }
                    var handlerCode = isMethodPath ? ("return " + (handler.value) + ".apply(null, arguments)") :
                        isFunctionExpression ? ("return (" + (handler.value) + ").apply(null, arguments)") :
                            isFunctionInvocation ? ("return " + (handler.value)) : handler.value;
                    return ("function($event){" + code + handlerCode + "}")
                }
            }

            function genKeyFilter(keys) {
                return (
                    // make sure the key filters only apply to KeyboardEvents
                    // #9441: can't use 'keyCode' in $event because Chrome autofill fires fake
                    // key events that do not have keyCode property...
                    "if(!$event.type.indexOf('key')&&" + (keys.map(genFilterCode).join('&&')) + ")return null;")
            }

            function genFilterCode(key) {
                var keyVal = parseInt(key, 10);
                if (keyVal) {
                    return ("$event.keyCode!==" + keyVal)
                }
                var keyCode = keyCodes[key];
                var keyName = keyNames[key];
                return ("_k($event.keyCode," + (JSON.stringify(key)) + "," + (JSON.stringify(keyCode)) + "," +
                    "$event.key," + "" + (JSON.stringify(keyName)) + ")")
            }
            /*  */
            function on(el, dir) {
                if (dir.modifiers) {
                    warn("v-on without argument does not support modifiers.");
                }
                el.wrapListeners = function(code) {
                    return ("_g(" + code + "," + (dir.value) + ")");
                };
            }
            /*  */
            function bind$1(el, dir) {
                el.wrapData = function(code) {
                    return ("_b(" + code + ",'" + (el.tag) + "'," + (dir.value) + "," + (dir.modifiers && dir
                        .modifiers.prop ? 'true' : 'false') + (dir.modifiers && dir.modifiers.sync ?
                        ',true' : '') + ")")
                };
            }
            /*  */
            var baseDirectives = {
                on: on,
                bind: bind$1,
                cloak: noop
            };
            /*  */
            var CodegenState = function CodegenState(options) {
                this.options = options;
                this.warn = options.warn || baseWarn;
                this.transforms = pluckModuleFunction(options.modules, 'transformCode');
                this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
                this.directives = extend(extend({}, baseDirectives), options.directives);
                var isReservedTag = options.isReservedTag || no;
                this.maybeComponent = function(el) {
                    return !!el.component || !isReservedTag(el.tag);
                };
                this.onceId = 0;
                this.staticRenderFns = [];
                this.pre = false;
            };

            function generate(ast, options) {
                var state = new CodegenState(options);
                // fix #11483, Root level <script> tags should not be rendered.
                var code = ast ? (ast.tag === 'script' ? 'null' : genElement(ast, state)) : '_c("div")';
                return {
                    render: ("with(this){return " + code + "}"),
                    staticRenderFns: state.staticRenderFns
                }
            }

            function genElement(el, state) {
                if (el.parent) {
                    el.pre = el.pre || el.parent.pre;
                }
                if (el.staticRoot && !el.staticProcessed) {
                    return genStatic(el, state)
                } else if (el.once && !el.onceProcessed) {
                    return genOnce(el, state)
                } else if (el.for && !el.forProcessed) {
                    return genFor(el, state)
                } else if (el.if && !el.ifProcessed) {
                    return genIf(el, state)
                } else if (el.tag === 'template' && !el.slotTarget && !state.pre) {
                    return genChildren(el, state) || 'void 0'
                } else if (el.tag === 'slot') {
                    return genSlot(el, state)
                } else {
                    // component or element
                    var code;
                    if (el.component) {
                        code = genComponent(el.component, el, state);
                    } else {
                        var data;
                        if (!el.plain || (el.pre && state.maybeComponent(el))) {
                            data = genData$2(el, state);
                        }
                        var children = el.inlineTemplate ? null : genChildren(el, state, true);
                        code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) :
                            '') + ")";
                    }
                    // module transforms
                    for (var i = 0; i < state.transforms.length; i++) {
                        code = state.transforms[i](el, code);
                    }
                    return code
                }
            }
            // hoist static sub-trees out
            function genStatic(el, state) {
                el.staticProcessed = true;
                // Some elements (templates) need to behave differently inside of a v-pre
                // node.  All pre nodes are static roots, so we can use this as a location to
                // wrap a state change and reset it upon exiting the pre node.
                var originalPreState = state.pre;
                if (el.pre) {
                    state.pre = el.pre;
                }
                state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
                state.pre = originalPreState;
                return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
            }
            // v-once
            function genOnce(el, state) {
                el.onceProcessed = true;
                if (el.if && !el.ifProcessed) {
                    return genIf(el, state)
                } else if (el.staticInFor) {
                    var key = '';
                    var parent = el.parent;
                    while (parent) {
                        if (parent.for) {
                            key = parent.key;
                            break
                        }
                        parent = parent.parent;
                    }
                    if (!key) {
                        state.warn("v-once can only be used inside v-for that is keyed. ", el.rawAttrsMap['v-once']);
                        return genElement(el, state)
                    }
                    return ("_o(" + (genElement(el, state)) + "," + (state.onceId++) + "," + key + ")")
                } else {
                    return genStatic(el, state)
                }
            }

            function genIf(el, state, altGen, altEmpty) {
                el.ifProcessed = true; // avoid recursion
                return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty)
            }

            function genIfConditions(conditions, state, altGen, altEmpty) {
                if (!conditions.length) {
                    return altEmpty || '_e()'
                }
                var condition = conditions.shift();
                if (condition.exp) {
                    return ("(" + (condition.exp) + ")?" + (genTernaryExp(condition.block)) + ":" + (genIfConditions(
                        conditions, state, altGen, altEmpty)))
                } else {
                    return ("" + (genTernaryExp(condition.block)))
                }
                // v-if with v-once should generate code like (a)?_m(0):_m(1)
                function genTernaryExp(el) {
                    return altGen ? altGen(el, state) : el.once ? genOnce(el, state) : genElement(el, state)
                }
            }

            function genFor(el, state, altGen, altHelper) {
                var exp = el.for;
                var alias = el.alias;
                var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
                var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
                if (state.maybeComponent(el) && el.tag !== 'slot' && el.tag !== 'template' && !el.key) {
                    state.warn("<" + (el.tag) + " v-for=\"" + alias + " in " + exp +
                        "\">: component lists rendered with " + "v-for should have explicit keys. " +
                        "See https://vuejs.org/guide/list.html#key for more info.", el.rawAttrsMap['v-for'],
                        true /* tip */ );
                }
                el.forProcessed = true; // avoid recursion
                return (altHelper || '_l') + "((" + exp + ")," + "function(" + alias + iterator1 + iterator2 + "){" +
                    "return " + ((altGen || genElement)(el, state)) + '})'
            }

            function genData$2(el, state) {
                var data = '{';
                // directives first.
                // directives may mutate the el's other properties before they are generated.
                var dirs = genDirectives(el, state);
                if (dirs) {
                    data += dirs + ',';
                }
                // key
                if (el.key) {
                    data += "key:" + (el.key) + ",";
                }
                // ref
                if (el.ref) {
                    data += "ref:" + (el.ref) + ",";
                }
                if (el.refInFor) {
                    data += "refInFor:true,";
                }
                // pre
                if (el.pre) {
                    data += "pre:true,";
                }
                // record original tag name for components using "is" attribute
                if (el.component) {
                    data += "tag:\"" + (el.tag) + "\",";
                }
                // module data generation functions
                for (var i = 0; i < state.dataGenFns.length; i++) {
                    data += state.dataGenFns[i](el);
                }
                // attributes
                if (el.attrs) {
                    data += "attrs:" + (genProps(el.attrs)) + ",";
                }
                // DOM props
                if (el.props) {
                    data += "domProps:" + (genProps(el.props)) + ",";
                }
                // event handlers
                if (el.events) {
                    data += (genHandlers(el.events, false)) + ",";
                }
                if (el.nativeEvents) {
                    data += (genHandlers(el.nativeEvents, true)) + ",";
                }
                // slot target
                // only for non-scoped slots
                if (el.slotTarget && !el.slotScope) {
                    data += "slot:" + (el.slotTarget) + ",";
                }
                // scoped slots
                if (el.scopedSlots) {
                    data += (genScopedSlots(el, el.scopedSlots, state)) + ",";
                }
                // component v-model
                if (el.model) {
                    data += "model:{value:" + (el.model.value) + ",callback:" + (el.model.callback) +
                        ",expression:" + (el.model.expression) + "},";
                }
                // inline-template
                if (el.inlineTemplate) {
                    var inlineTemplate = genInlineTemplate(el, state);
                    if (inlineTemplate) {
                        data += inlineTemplate + ",";
                    }
                }
                data = data.replace(/,$/, '') + '}';
                // v-bind dynamic argument wrap
                // v-bind with dynamic arguments must be applied using the same v-bind object
                // merge helper so that class/style/mustUseProp attrs are handled correctly.
                if (el.dynamicAttrs) {
                    data = "_b(" + data + ",\"" + (el.tag) + "\"," + (genProps(el.dynamicAttrs)) + ")";
                }
                // v-bind data wrap
                if (el.wrapData) {
                    data = el.wrapData(data);
                }
                // v-on data wrap
                if (el.wrapListeners) {
                    data = el.wrapListeners(data);
                }
                return data
            }

            function genDirectives(el, state) {
                var dirs = el.directives;
                if (!dirs) {
                    return
                }
                var res = 'directives:[';
                var hasRuntime = false;
                var i, l, dir, needRuntime;
                for (i = 0, l = dirs.length; i < l; i++) {
                    dir = dirs[i];
                    needRuntime = true;
                    var gen = state.directives[dir.name];
                    if (gen) {
                        // compile-time directive that manipulates AST.
                        // returns true if it also needs a runtime counterpart.
                        needRuntime = !!gen(el, dir, state.warn);
                    }
                    if (needRuntime) {
                        hasRuntime = true;
                        res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (
                            ",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (
                            dir.arg ? (",arg:" + (dir.isDynamicArg ? dir.arg : ("\"" + (dir.arg) + "\""))) : ''
                        ) + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
                    }
                }
                if (hasRuntime) {
                    return res.slice(0, -1) + ']'
                }
            }

            function genInlineTemplate(el, state) {
                var ast = el.children[0];
                if (el.children.length !== 1 || ast.type !== 1) {
                    state.warn('Inline-template components must have exactly one child element.', {
                        start: el.start
                    });
                }
                if (ast && ast.type === 1) {
                    var inlineRenderFns = generate(ast, state.options);
                    return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" +
                        (inlineRenderFns.staticRenderFns.map(function(code) {
                            return ("function(){" + code + "}");
                        }).join(',')) + "]}")
                }
            }

            function genScopedSlots(el, slots, state) {
                // by default scoped slots are considered "stable", this allows child
                // components with only scoped slots to skip forced updates from parent.
                // but in some cases we have to bail-out of this optimization
                // for example if the slot contains dynamic names, has v-if or v-for on them...
                var needsForceUpdate = el.for || Object.keys(slots).some(function(key) {
                    var slot = slots[key];
                    return (slot.slotTargetDynamic || slot.if || slot.for || containsSlotChild(
                            slot) // is passing down slot from parent which may be dynamic
                    )
                });
                // #9534: if a component with scoped slots is inside a conditional branch,
                // it's possible for the same component to be reused but with different
                // compiled slot content. To avoid that, we generate a unique key based on
                // the generated code of all the slot contents.
                var needsKey = !!el.if;
                // OR when it is inside another scoped slot or v-for (the reactivity may be
                // disconnected due to the intermediate scope variable)
                // #9438, #9506
                // TODO: this can be further optimized by properly analyzing in-scope bindings
                // and skip force updating ones that do not actually use scope variables.
                if (!needsForceUpdate) {
                    var parent = el.parent;
                    while (parent) {
                        if (
                            (parent.slotScope && parent.slotScope !== emptySlotScopeToken) || parent.for) {
                            needsForceUpdate = true;
                            break
                        }
                        if (parent.if) {
                            needsKey = true;
                        }
                        parent = parent.parent;
                    }
                }
                var generatedSlots = Object.keys(slots).map(function(key) {
                    return genScopedSlot(slots[key], state);
                }).join(',');
                return ("scopedSlots:_u([" + generatedSlots + "]" + (needsForceUpdate ? ",null,true" : "") + (!
                    needsForceUpdate && needsKey ? (",null,false," + (hash(generatedSlots))) : "") + ")")
            }

            function hash(str) {
                var hash = 5381;
                var i = str.length;
                while (i) {
                    hash = (hash * 33) ^ str.charCodeAt(--i);
                }
                return hash >>> 0
            }

            function containsSlotChild(el) {
                if (el.type === 1) {
                    if (el.tag === 'slot') {
                        return true
                    }
                    return el.children.some(containsSlotChild)
                }
                return false
            }

            function genScopedSlot(el, state) {
                var isLegacySyntax = el.attrsMap['slot-scope'];
                if (el.if && !el.ifProcessed && !isLegacySyntax) {
                    return genIf(el, state, genScopedSlot, "null")
                }
                if (el.for && !el.forProcessed) {
                    return genFor(el, state, genScopedSlot)
                }
                var slotScope = el.slotScope === emptySlotScopeToken ? "" : String(el.slotScope);
                var fn = "function(" + slotScope + "){" + "return " + (el.tag === 'template' ? el.if &&
                isLegacySyntax ? ("(" + (el.if) + ")?" + (genChildren(el, state) || 'undefined') +
                    ":undefined") : genChildren(el, state) || 'undefined' : genElement(el, state)) + "}";
                // reverse proxy v-slot without scope on this.$slots
                var reverseProxy = slotScope ? "" : ",proxy:true";
                return ("{key:" + (el.slotTarget || "\"default\"") + ",fn:" + fn + reverseProxy + "}")
            }

            function genChildren(el, state, checkSkip, altGenElement, altGenNode) {
                var children = el.children;
                if (children.length) {
                    var el$1 = children[0];
                    // optimize single v-for
                    if (children.length === 1 && el$1.for && el$1.tag !== 'template' && el$1.tag !== 'slot') {
                        var normalizationType = checkSkip ? state.maybeComponent(el$1) ? ",1" : ",0" : "";
                        return ("" + ((altGenElement || genElement)(el$1, state)) + normalizationType)
                    }
                    var normalizationType$1 = checkSkip ? getNormalizationType(children, state.maybeComponent) : 0;
                    var gen = altGenNode || genNode;
                    return ("[" + (children.map(function(c) {
                        return gen(c, state);
                    }).join(',')) + "]" + (normalizationType$1 ? ("," + normalizationType$1) : ''))
                }
            }
            // determine the normalization needed for the children array.
            // 0: no normalization needed
            // 1: simple normalization needed (possible 1-level deep nested array)
            // 2: full normalization needed
            function getNormalizationType(children, maybeComponent) {
                var res = 0;
                for (var i = 0; i < children.length; i++) {
                    var el = children[i];
                    if (el.type !== 1) {
                        continue
                    }
                    if (needsNormalization(el) || (el.ifConditions && el.ifConditions.some(function(c) {
                        return needsNormalization(c.block);
                    }))) {
                        res = 2;
                        break
                    }
                    if (maybeComponent(el) || (el.ifConditions && el.ifConditions.some(function(c) {
                        return maybeComponent(c.block);
                    }))) {
                        res = 1;
                    }
                }
                return res
            }

            function needsNormalization(el) {
                return el.for !== undefined || el.tag === 'template' || el.tag === 'slot'
            }

            function genNode(node, state) {
                if (node.type === 1) {
                    return genElement(node, state)
                } else if (node.type === 3 && node.isComment) {
                    return genComment(node)
                } else {
                    return genText(node)
                }
            }

            function genText(text) {
                return ("_v(" + (text.type === 2 ? text.expression // no need for () because already wrapped in _s()
                    : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
            }

            function genComment(comment) {
                return ("_e(" + (JSON.stringify(comment.text)) + ")")
            }

            function genSlot(el, state) {
                var slotName = el.slotName || '"default"';
                var children = genChildren(el, state);
                var res = "_t(" + slotName + (children ? (",function(){return " + children + "}") : '');
                var attrs = el.attrs || el.dynamicAttrs ? genProps((el.attrs || []).concat(el.dynamicAttrs || [])
                    .map(function(attr) {
                        return ({
                            // slot props are camelized
                            name: camelize(attr.name),
                            value: attr.value,
                            dynamic: attr.dynamic
                        });
                    })) : null;
                var bind$$1 = el.attrsMap['v-bind'];
                if ((attrs || bind$$1) && !children) {
                    res += ",null";
                }
                if (attrs) {
                    res += "," + attrs;
                }
                if (bind$$1) {
                    res += (attrs ? '' : ',null') + "," + bind$$1;
                }
                return res + ')'
            }
            // componentName is el.component, take it as argument to shun flow's pessimistic refinement
            function genComponent(componentName, el, state) {
                var children = el.inlineTemplate ? null : genChildren(el, state, true);
                return ("_c(" + componentName + "," + (genData$2(el, state)) + (children ? ("," + children) : '') +
                    ")")
            }

            function genProps(props) {
                var staticProps = "";
                var dynamicProps = "";
                for (var i = 0; i < props.length; i++) {
                    var prop = props[i];
                    var value = transformSpecialNewlines(prop.value);
                    if (prop.dynamic) {
                        dynamicProps += (prop.name) + "," + value + ",";
                    } else {
                        staticProps += "\"" + (prop.name) + "\":" + value + ",";
                    }
                }
                staticProps = "{" + (staticProps.slice(0, -1)) + "}";
                if (dynamicProps) {
                    return ("_d(" + staticProps + ",[" + (dynamicProps.slice(0, -1)) + "])")
                } else {
                    return staticProps
                }
            }
            // #3895, #4268
            function transformSpecialNewlines(text) {
                return text.replace(/\u2028/g, '\\u2028').replace(/\u2029/g, '\\u2029')
            }
            /*  */
            // these keywords should not appear inside expressions, but operators like
            // typeof, instanceof and in are allowed
            var prohibitedKeywordRE = new RegExp('\\b' + (
                'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
                'super,throw,while,yield,delete,export,import,return,switch,default,' +
                'extends,finally,continue,debugger,function,arguments').split(',').join('\\b|\\b') + '\\b');
            // these unary operators should not be used as property/method names
            var unaryOperatorsRE = new RegExp('\\b' + ('delete,typeof,void').split(',').join(
                '\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
            // strip strings in expressions
            var stripStringRE =
                /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
            // detect problematic expressions in a template
            function detectErrors(ast, warn) {
                if (ast) {
                    checkNode(ast, warn);
                }
            }

            function checkNode(node, warn) {
                if (node.type === 1) {
                    for (var name in node.attrsMap) {
                        if (dirRE.test(name)) {
                            var value = node.attrsMap[name];
                            if (value) {
                                var range = node.rawAttrsMap[name];
                                if (name === 'v-for') {
                                    checkFor(node, ("v-for=\"" + value + "\""), warn, range);
                                } else if (name === 'v-slot' || name[0] === '#') {
                                    checkFunctionParameterExpression(value, (name + "=\"" + value + "\""), warn,
                                        range);
                                } else if (onRE.test(name)) {
                                    checkEvent(value, (name + "=\"" + value + "\""), warn, range);
                                } else {
                                    checkExpression(value, (name + "=\"" + value + "\""), warn, range);
                                }
                            }
                        }
                    }
                    if (node.children) {
                        for (var i = 0; i < node.children.length; i++) {
                            checkNode(node.children[i], warn);
                        }
                    }
                } else if (node.type === 2) {
                    checkExpression(node.expression, node.text, warn, node);
                }
            }

            function checkEvent(exp, text, warn, range) {
                var stripped = exp.replace(stripStringRE, '');
                var keywordMatch = stripped.match(unaryOperatorsRE);
                if (keywordMatch && stripped.charAt(keywordMatch.index - 1) !== '$') {
                    warn("avoid using JavaScript unary operator as property name: " + "\"" + (keywordMatch[0]) +
                        "\" in expression " + (text.trim()), range);
                }
                checkExpression(exp, text, warn, range);
            }

            function checkFor(node, text, warn, range) {
                checkExpression(node.for || '', text, warn, range);
                checkIdentifier(node.alias, 'v-for alias', text, warn, range);
                checkIdentifier(node.iterator1, 'v-for iterator', text, warn, range);
                checkIdentifier(node.iterator2, 'v-for iterator', text, warn, range);
            }

            function checkIdentifier(ident, type, text, warn, range) {
                if (typeof ident === 'string') {
                    try {
                        new Function(("var " + ident + "=_"));
                    } catch (e) {
                        warn(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())), range);
                    }
                }
            }

            function checkExpression(exp, text, warn, range) {
                try {
                    new Function(("return " + exp));
                } catch (e) {
                    var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
                    if (keywordMatch) {
                        warn("avoid using JavaScript keyword as property name: " + "\"" + (keywordMatch[0]) +
                            "\"\n  Raw expression: " + (text.trim()), range);
                    } else {
                        warn("invalid expression: " + (e.message) + " in\n\n" + "    " + exp + "\n\n" +
                            "  Raw expression: " + (text.trim()) + "\n", range);
                    }
                }
            }

            function checkFunctionParameterExpression(exp, text, warn, range) {
                try {
                    new Function(exp, '');
                } catch (e) {
                    warn("invalid function parameter expression: " + (e.message) + " in\n\n" + "    " + exp +
                        "\n\n" + "  Raw expression: " + (text.trim()) + "\n", range);
                }
            }
            /*  */
            var range = 2;

            function generateCodeFrame(source, start, end) {
                if (start === void 0) start = 0;
                if (end === void 0) end = source.length;
                var lines = source.split(/\r?\n/);
                var count = 0;
                var res = [];
                for (var i = 0; i < lines.length; i++) {
                    count += lines[i].length + 1;
                    if (count >= start) {
                        for (var j = i - range; j <= i + range || end > count; j++) {
                            if (j < 0 || j >= lines.length) {
                                continue
                            }
                            res.push(("" + (j + 1) + (repeat$1(" ", 3 - String(j + 1).length)) + "|  " + (lines[
                                j])));
                            var lineLength = lines[j].length;
                            if (j === i) {
                                // push underline
                                var pad = start - (count - lineLength) + 1;
                                var length = end > count ? lineLength - pad : end - start;
                                res.push("   |  " + repeat$1(" ", pad) + repeat$1("^", length));
                            } else if (j > i) {
                                if (end > count) {
                                    var length$1 = Math.min(end - count, lineLength);
                                    res.push("   |  " + repeat$1("^", length$1));
                                }
                                count += lineLength + 1;
                            }
                        }
                        break
                    }
                }
                return res.join('\n')
            }

            function repeat$1(str, n) {
                var result = '';
                if (n > 0) {
                    while (true) { // eslint-disable-line
                        if (n & 1) {
                            result += str;
                        }
                        n >>>= 1;
                        if (n <= 0) {
                            break
                        }
                        str += str;
                    }
                }
                return result
            }
            /*  */
            function createFunction(code, errors) {
                try {
                    return new Function(code)
                } catch (err) {
                    errors.push({
                        err: err,
                        code: code
                    });
                    return noop
                }
            }

            function createCompileToFunctionFn(compile) {
                var cache = Object.create(null);
                return function compileToFunctions(template, options, vm) {
                    options = extend({}, options);
                    var warn$$1 = options.warn || warn;
                    delete options.warn;
                    /* istanbul ignore if */
                    {
                        // detect possible CSP restriction
                        try {
                            new Function('return 1');
                        } catch (e) {
                            if (e.toString().match(/unsafe-eval|CSP/)) {
                                warn$$1('It seems you are using the standalone build of Vue.js in an ' +
                                    'environment with Content Security Policy that prohibits unsafe-eval. ' +
                                    'The template compiler cannot work in this environment. Consider ' +
                                    'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
                                    'templates into render functions.');
                            }
                        }
                    }
                    // check cache
                    var key = options.delimiters ? String(options.delimiters) + template : template;
                    if (cache[key]) {
                        return cache[key]
                    }
                    // compile
                    var compiled = compile(template, options);
                    // check compilation errors/tips
                    {
                        if (compiled.errors && compiled.errors.length) {
                            if (options.outputSourceRange) {
                                compiled.errors.forEach(function(e) {
                                    warn$$1("Error compiling template:\n\n" + (e.msg) + "\n\n" +
                                        generateCodeFrame(template, e.start, e.end), vm);
                                });
                            } else {
                                warn$$1("Error compiling template:\n\n" + template + "\n\n" + compiled.errors
                                    .map(function(e) {
                                        return ("- " + e);
                                    }).join('\n') + '\n', vm);
                            }
                        }
                        if (compiled.tips && compiled.tips.length) {
                            if (options.outputSourceRange) {
                                compiled.tips.forEach(function(e) {
                                    return tip(e.msg, vm);
                                });
                            } else {
                                compiled.tips.forEach(function(msg) {
                                    return tip(msg, vm);
                                });
                            }
                        }
                    }
                    // turn code into functions
                    var res = {};
                    var fnGenErrors = [];
                    res.render = createFunction(compiled.render, fnGenErrors);
                    res.staticRenderFns = compiled.staticRenderFns.map(function(code) {
                        return createFunction(code, fnGenErrors)
                    });
                    // check function generation errors.
                    // this should only happen if there is a bug in the compiler itself.
                    // mostly for codegen development use
                    /* istanbul ignore if */
                    {
                        if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
                            warn$$1("Failed to generate render function:\n\n" + fnGenErrors.map(function(ref) {
                                var err = ref.err;
                                var code = ref.code;
                                return ((err.toString()) + " in\n\n" + code + "\n");
                            }).join('\n'), vm);
                        }
                    }
                    return (cache[key] = res)
                }
            }
            /*  */
            function createCompilerCreator(baseCompile) {
                return function createCompiler(baseOptions) {
                    function compile(template, options) {
                        var finalOptions = Object.create(baseOptions);
                        var errors = [];
                        var tips = [];
                        var warn = function(msg, range, tip) {
                            (tip ? tips : errors).push(msg);
                        };
                        if (options) {
                            if (options.outputSourceRange) {
                                // $flow-disable-line
                                var leadingSpaceLength = template.match(/^\s*/)[0].length;
                                warn = function(msg, range, tip) {
                                    var data = {
                                        msg: msg
                                    };
                                    if (range) {
                                        if (range.start != null) {
                                            data.start = range.start + leadingSpaceLength;
                                        }
                                        if (range.end != null) {
                                            data.end = range.end + leadingSpaceLength;
                                        }
                                    }
                                    (tip ? tips : errors).push(data);
                                };
                            }
                            // merge custom modules
                            if (options.modules) {
                                finalOptions.modules = (baseOptions.modules || []).concat(options.modules);
                            }
                            // merge custom directives
                            if (options.directives) {
                                finalOptions.directives = extend(Object.create(baseOptions.directives || null),
                                    options.directives);
                            }
                            // copy other options
                            for (var key in options) {
                                if (key !== 'modules' && key !== 'directives') {
                                    finalOptions[key] = options[key];
                                }
                            }
                        }
                        finalOptions.warn = warn;
                        var compiled = baseCompile(template.trim(), finalOptions); {
                            detectErrors(compiled.ast, warn);
                        }
                        compiled.errors = errors;
                        compiled.tips = tips;
                        return compiled
                    }
                    return {
                        compile: compile,
                        compileToFunctions: createCompileToFunctionFn(compile)
                    }
                }
            }
            /*  */
            // `createCompilerCreator` allows creating compilers that use alternative
            // parser/optimizer/codegen, e.g the SSR optimizing compiler.
            // Here we just export a default compiler using the default parts.
            var createCompiler = createCompilerCreator(function baseCompile(template, options) {
                var ast = parse(template.trim(), options);
                if (options.optimize !== false) {
                    optimize(ast, options);
                }
                var code = generate(ast, options);
                return {
                    ast: ast,
                    render: code.render,
                    staticRenderFns: code.staticRenderFns
                }
            });
            /*  */
            var ref$1 = createCompiler(baseOptions);
            var compile = ref$1.compile;
            var compileToFunctions = ref$1.compileToFunctions;
            /*  */
            // check whether current browser encodes a char inside attribute values
            var div;

            function getShouldDecode(href) {
                div = div || document.createElement('div');
                div.innerHTML = href ? "<a href=\"\n\"/>" : "<div a=\"\n\"/>";
                return div.innerHTML.indexOf('&#10;') > 0
            }
            // #3663: IE encodes newlines inside attribute values while other browsers don't
            var shouldDecodeNewlines = inBrowser ? getShouldDecode(false) : false;
            // #6828: chrome encodes content in a[href]
            var shouldDecodeNewlinesForHref = inBrowser ? getShouldDecode(true) : false;
            /*  */
            var idToTemplate = cached(function(id) {
                var el = query(id);
                return el && el.innerHTML
            });
            var mount = Vue.prototype.$mount;
            Vue.prototype.$mount = function(el, hydrating) {
                el = el && query(el);
                /* istanbul ignore if */
                if (el === document.body || el === document.documentElement) {
                    warn("Do not mount Vue to <html> or <body> - mount to normal elements instead.");
                    return this
                }
                var options = this.$options;
                // resolve template/el and convert to render function
                if (!options.render) {
                    var template = options.template;
                    if (template) {
                        if (typeof template === 'string') {
                            if (template.charAt(0) === '#') {
                                template = idToTemplate(template);
                                /* istanbul ignore if */
                                if (!template) {
                                    warn(
                                        ("Template element not found or is empty: " + (options.template)),
                                        this);
                                }
                            }
                        } else if (template.nodeType) {
                            template = template.innerHTML;
                        } else {
                            {
                                warn('invalid template option:' + template, this);
                            }
                            return this
                        }
                    } else if (el) {
                        template = getOuterHTML(el);
                    }
                    if (template) {
                        /* istanbul ignore if */
                        if (config.performance && mark) {
                            mark('compile');
                        }
                        var ref = compileToFunctions(template, {
                            outputSourceRange: "development" !== 'production',
                            shouldDecodeNewlines: shouldDecodeNewlines,
                            shouldDecodeNewlinesForHref: shouldDecodeNewlinesForHref,
                            delimiters: options.delimiters,
                            comments: options.comments
                        }, this);
                        var render = ref.render;
                        var staticRenderFns = ref.staticRenderFns;
                        options.render = render;
                        options.staticRenderFns = staticRenderFns;
                        /* istanbul ignore if */
                        if (config.performance && mark) {
                            mark('compile end');
                            measure(("vue " + (this._name) + " compile"), 'compile', 'compile end');
                        }
                    }
                }
                return mount.call(this, el, hydrating)
            };
            /**
             * Get outerHTML of elements, taking care
             * of SVG elements in IE as well.
             */
            function getOuterHTML(el) {
                if (el.outerHTML) {
                    return el.outerHTML
                } else {
                    var container = document.createElement('div');
                    container.appendChild(el.cloneNode(true));
                    return container.innerHTML
                }
            }
            Vue.compile = compileToFunctions;
            return Vue;
        }));
    </script>
</head>
<body>
<div id="app">
    <div v-if="isShow">
        <div class="bg">
            <div class="form_box">
                <div class="box_title">填写安装资料 <div class="box_tip">
                    <a href="https://q.jc362.com/thread/33">安装教程说明（必看）</a>
                </div>
                </div>
                <el-form ref="formRef" :rules="formRules" :model="form" label-width="150px" class="dif">
                    <div class="form_items">
                        <div class="form_title">MySQL数据库配置</div>
                        <el-form-item label="数据库服务器：" prop="db_servername">
                            <el-input placeholder="数据库地址" v-model="form.db_servername"></el-input>
                        </el-form-item>
                        <el-form-item label="数据库端口：">
                            <el-input placeholder="可不填,数据库端口号,默认3306" v-model="form.db_port"></el-input>
                        </el-form-item>
                        <el-form-item label="数据库账号：" prop="db_username">
                            <el-input placeholder="数据库登录账号" v-model="form.db_username" prop="db_port">
                            </el-input>
                        </el-form-item>
                        <el-form-item label="数据库密码：" prop="db_password">
                            <el-input placeholder="数据库登录密码" v-model="form.db_password" type="password">
                            </el-input>
                        </el-form-item>
                        <el-form-item label="数据库名称：" prop="db_database">
                            <el-input placeholder="数据库名称" v-model="form.db_database"></el-input>
                        </el-form-item>
                    </div>
                    <div class="form_items">
                        <div class="form_title">Redis配置</div>
                        <el-form-item label="Redis服务器：" prop="redis_servername">
                            <el-input placeholder="Redis服务器地址" v-model="form.redis_servername"></el-input>
                        </el-form-item>
                        <el-form-item label="Redis端口：" prop="redis_port">
                            <el-input placeholder="可不填,Redis服务器端口号,默认6379" v-model="form.redis_port"></el-input>
                        </el-form-item>
                        <el-form-item label="Redis密码：">
                            <el-input placeholder="可不填,Redis登录密码,默认未开启" v-model="form.redis_password"
                                      type="password"></el-input>
                        </el-form-item>
                        <el-form-item label="Redis库：" prop="redis_select">
                            <el-select v-model="form.redis_select" placeholder="请选择">
                                <el-option v-for="item in options" :key="item.value" :label="item.label"
                                           :value="item.value">
                                </el-option>
                            </el-select>
                        </el-form-item>
                    </div>
                    <div class="form_items">
                        <div class="form_title">后台管理员账户密码</div>
                        <el-form-item label="初始后台登录账号：" prop="admin_username">
                            <el-input placeholder="saas后台初始登录账号" v-model="form.admin_username"></el-input>
                        </el-form-item>
                        <el-form-item label="初始后台登录密码：" prop="admin_password">
                            <el-input placeholder="saas后台初始登录密码" v-model="form.admin_password" type="password">
                            </el-input>
                        </el-form-item>
                        <el-form-item label="初始商城id：" prop="mall_id">
                            <el-input placeholder="mall后台初始id" v-model="form.mall_id" type="number">
                            </el-input>
                        </el-form-item>
                    </div>
                </el-form>
                <div class="difc">
                    <div class="difc_buttom" @click="submitForm('formRef')">提交</div>
                    <div class="difc_buttom" @click="clearForm()">重置</div>
                </div>
                <div class="foot_alert">提示：节程商城系统</div>
            </div>
        </div>
        <div v-show="isSuccess" class="success_box">
            <div class="box_img">
                <img src="image/success.png" alt="">
                <div class="success_button" @click="goto">跳转登陆页({{btntxt}})</div>
            </div>
        </div>
        <div v-show="isLoading" class="c3">
            <div class="c3_box">
                <el-progress :stroke-width="15" :width="180" type="circle" :percentage="loadProgress"
                             :status="loadResult"></el-progress>
                <div class="txt">{{loadResultTxt}}</div>
            </div>
        </div>
        <el-dialog :visible.sync="dialogVisible" append-to-body custom-class="dialog_bg">
            <div class="dialog_title">{{errorMsg.msg}}</div>
            <img src="image/error.png" alt="">
            <div class="dialog_button" @click="closeDialog()">确定</div>
        </el-dialog>
    </div>
</div>
</body>
</html>
<!-- 引入组件库 -->
<!--<script src="https://unpkg.com/vue/dist/vue.js"></script>-->
<!-- <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script> -->
<script src="https://unpkg.com/axios/dist/axios.min.js"></script>
<script src="https://unpkg.com/element-ui/lib/index.js"></script>
<script>
    new Vue({
        el: '#app',
        data: function() {
            return {
                form: {
                    db_servername: '',
                    db_port: '',
                    db_username: '',
                    db_password: '',
                    admin_username: '',
                    admin_password: '',
                    redis_servername: '',
                    redis_port: '',
                    mall_id: '',
                    redis_password: '',
                    redis_select:0


                },
                errorMsg: {
                    msg: ""
                },
                options: [{
                    value: 0,
                    label: '库0'
                }, {
                    value: 1,
                    label: '库1'
                }, {
                    value: 2,
                    label: '库2'
                }, {
                    value: 3,
                    label: '库3'
                }, {
                    value: 4,
                    label: '库4'
                }, {
                    value: 5,
                    label: '库5'
                }, {
                    value: 6,
                    label: '库6'
                }, {
                    value: 7,
                    label: '库7'
                }, {
                    value: 8,
                    label: '库8'
                }, {
                    value: 9,
                    label: '库9'
                }, {
                    value: 10,
                    label: '库10'
                }, {
                    value: 11,
                    label: '库11'
                }, {
                    value: 12,
                    label: '库12'
                }, {
                    value: 13,
                    label: '库13'
                }, {
                    value: 14,
                    label: '库14'
                }, {
                    value: 15,
                    label: '库15'
                }, ],
                formRules: {
                    db_servername: [{
                        required: true,
                        message: '请输入数据库服务器',
                        trigger: 'blur'
                    }, ],
                    db_port: [
                        // { required: true, message: '请输入数据库端口', trigger: 'blur' }
                    ],
                    db_username: [{
                        required: true,
                        message: '请输入数据库用户',
                        trigger: 'blur'
                    }],
                    db_password: [{
                        required: true,
                        message: '请输入数据库密码',
                        trigger: 'blur'
                    }],
                    admin_username: [{
                        required: true,
                        message: '请输入初始后台登录账号',
                        trigger: 'blur'
                    }, {
                        min: 4,
                        max: 15,
                        message: '长度在 4 到 15 个字符',
                        trigger: 'blur'
                    }],
                    admin_password: [{
                        required: true,
                        message: '请输入初始后台登录密码',
                        trigger: 'blur'
                    }, {
                        min: 4,
                        max: 30,
                        message: '长度在 4 到 30 个字符',
                        trigger: 'blur'
                    }],
                    mall_id: [
                        {required: true, message: '请输入初始商城id', trigger: 'blur'}
                    ],
                    redis_servername: [{
                        required: true,
                        message: '请输入Redis服务器',
                        trigger: 'blur'
                    }, {
                        min: 6,
                        max: 15,
                        message: '长度在 6 到 15 个字符',
                        trigger: 'blur'
                    }],
                    redis_password: [
                        // { required: true, message: '请输入Redis密码', trigger: 'blur' }
                    ],
                    redis_select:[
                        {
                            required: true,
                            message: '请选择Redis库',
                            trigger: 'change'
                        }
                    ],
                    db_database: [{
                        required: true,
                        message: '请输入数据库名称',
                        trigger: 'blur'
                    }],
                },
                dialogVisible: false, //事败框
                isSuccess: false, // 成功框
                isShow: false,
                time: 5,
                btntxt: '',
                loading: false,
                loadProgress: 0,
                loadResult: null,
                loadResultTxt: '',
                isLoading: false,
            }
        },
        created() {
            this.isShow = true
        },
        methods: {
            // 表单提交
            submitForm(data) {
                // console.log(data)
                // 表单验证
                this.$refs[data].validate((valid) => {
                    // 如果成功
                    if (valid) {
                        this.postaxios()
                    }
                })
            },
            // 清楚表单
            clearForm() {
                this.form = {}
            },
            //异步请求
            postaxios() {
                let _this = this
                this.isLoading = true
                this.loadProgress = 0;
                this.loadResult = null;
                this.loadResultTxt = '生成中......';
                let x = setInterval(() => {
                    if (this.loadProgress < 100) {
                        this.loadProgress++;
                    } else {
                        clearInterval(x);
                    }
                }, 1800);
                axios.post('/install.php/login', this.form,
                    // {headers: {'Content-Type': 'application/x-www-form-urlencoded'}}
                ).then(response => {
                    if (response.status !== 200) {
                        _this.loadProgress = 100;
                        clearInterval(x);
                        _this.isLoading = false
                        _this.errorMsg.msg = "请求失败";
                        _this.dialogVisible = !_this.dialogVisible;
                        return;
                    }
                    if (response.data.code !== 200) {
                        _this.loadProgress = 100;
                        clearInterval(x);
                        _this.isLoading = false
                        _this.errorMsg.msg = response.data.data.error_msg;
                        _this.dialogVisible = !_this.dialogVisible;
                        return;
                    }
                    if (response.data.code == 200) {
                        setTimeout(() => {
                            _this.loadProgress = 100;
                            _this.isLoading = false
                            _this.isSuccess = !_this.isSuccess;
                            _this.timer()
                            clearInterval(x);
                        }, 5000)
                        return;
                    }
                    setTimeout(() => {
                        _this.loadProgress = 100;
                        clearInterval(x);
                        _this.isLoading = false
                        _this.isSuccess = !_this.isSuccess;
                        _this.timer()
                    }, 200000)
                }) // 请求成功
                    .catch(function(error) { // 请求失败处理
                        this.dialogVisible = !this.dialogVisible // 失败弹框
                    });
            },
            timer() {
                if (this.time > 0) {
                    this.time--;
                    this.btntxt = this.time + "秒";
                    setTimeout(this.timer, 1000);
                } else {
                    this.time = 0;
                    // this.$router.push('/#/saas_loing');
                    this.goto()
                }
            },
            goto() {
                window.location.href = "/mall.html"
            },
            closeDialog() {
                this.dialogVisible = !this.dialogVisible
            }
        }
    })
</script>
<style>
    * {
        padding: 0;
        margin: 0;
        font-family: PingFang-SC-Bold, serif;
    }

    body {
        width: 100%;
        margin: auto;
    }

    .bg {
        position: absolute;
        width: 100%;
        height: 100%;
        display: block;
        background: url(./image/index_bg.png) no-repeat 100% 100%;
    }

    .dif {
        display: flex;
        justify-content: space-between;
        padding: 30px 50px;
        flex-wrap: wrap;
    }

    .difc {
        display: flex;
        justify-content: center;
        padding: 30px 50px;
        flex-wrap: wrap;
    }

    .difc .difc_buttom {
        width: 30%;
        height: 40px;
        line-height: 40px;
        padding: 0;
        color: #fff;
        text-align: center;
        background: #0052CC;
        transition: all 0.3s;
        margin: 0px 20px;
    }

    .difc .difc_buttom:hover {
        box-shadow: 0px 1px 10px #0052CC;
        cursor: pointer;
    }

    .form_box {
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
        width: 80%;
        max-width: 1200px;
        box-shadow: 0px 5px 13px #0052cc9c;
        background: #fff;
        padding-bottom: 20px;
    }

    .form_box .box_title {
        width: 100%;
        height: 80px;
        line-height: 80px;
        text-align: center;
        font-size: 23px;
        color: #fff;
        text-indent: 20px;
        background: #0052CC;
    }

    .form_box .box_tip {
        color: red;
        position: absolute;
        right: 15px;
        top: 15px;
        font-size: 16px;
        cursor: pointer;
    }

    .form_box .box_tip a {
        color: red;
        text-underline: none;
        font-weight: 600;
    }

    .form_box .form_items {
        width: 45%;
    }

    .form_box .form_items:last-child {
        margin-top: 20px;
    }

    .form_box .form_items .form_title {
        font-size: 24px;
        font-weight: bold;
        margin-bottom: 30px;
    }

    .form_box .foot_alert {
        text-align: center;
        color: #CA0000;
        font-size: 19px;
    }

    .dialog_bg {
        width: 30%;
        border-radius: 10px;
        box-shadow: none;
        padding: 80px 60px;
        box-sizing: border-box;
        text-align: center;
    }

    .dialog_bg * {
        padding: 0;
    }

    .dialog_bg .dialog_title {
        font-size: 24px;
        font-weight: bold;
        color: #141414;
        text-align: center;
    }

    .dialog_bg img {
        width: 80%;
        margin: 40px auto 80px auto;
    }

    .dialog_bg .dialog_button {
        width: 100%;
        height: 40px;
        line-height: 40px;
        border-radius: 30px;
        display: block;
        background: #0052CC;
        text-align: center;
        color: #fff;
        transition: all 0.3s;
    }

    .dialog_bg .dialog_button:hover {
        box-shadow: 0 1px 10px #0052cc94;
    }

    .success_box {
        position: absolute;
        width: 100%;
        height: 100%;
        display: block;
        background: #fff;
        z-index: 999;
    }

    .success_box .box_img {
        max-width: 1200px;
        margin: auto;
    }

    .success_box .box_img .success_button {
        width: 20%;
        margin: auto;
        height: 40px;
        line-height: 40px;
        border-radius: 30px;
        display: block;
        background: none;
        border-radius: 30px;
        border: 2px solid #474242;
        text-align: center;
        color: #474242;
        transition: all 0.3s;
    }

    .success_box .box_img .success_button:hover {
        cursor: pointer;
    }

    .success_box .box_img img {
        width: 100%;
    }

    .disn {
        display: none;
    }

    .c3 {
        width: 100%;
        height: 100%;
        background: #fff;
        text-align: center;
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        display: block;
    }

    .c3 .c3_box {
        width: 300px;
        height: 300px;
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
    }

    .txt {
        margin-top: 30px;
        font-size: 16px;
    }
</style>